| PF00047 | ig | Immunoglobulin domain | P11911 |
| PF00048 | IL8 | Small cytokines (intecrine/chemokine), interleukin-8 like | P78423 |
| PF00049 | Insulin | Insulin/IGF/Relaxin family | P01315 |
| PF00143 | Interferon | Interferon alpha/beta domain | A0A3G3BTG1 |
| PF00180 | Iso_dh | Isocitrate/isopropylmalate dehydrogenase | P08200 |
| PF00218 | IGPS | Indole-3-glycerol phosphate synthase | P06560 |
| PF00219 | IGFBP | Insulin-like growth factor binding protein | P17936 |
| PF00340 | IL1 | Interleukin-1 / 18 | P01584 |
| PF00357 | Integrin_alpha | Integrin alpha cytoplasmic region | P08514 |
| PF00362 | Integrin_beta | Integrin beta chain VWA domain | P26012 |
| PF00459 | Inositol_P | Inositol monophosphatase family | Q42546 |
| PF00463 | ICL | Isocitrate lyase family | Q2YQA0 |
| PF00475 | IGPD | Imidazoleglycerol-phosphate dehydratase | A0A072VQG6 |
| PF00478 | IMPDH | IMP dehydrogenase / GMP reductase domain | Q8YAJ3 |
| PF00489 | IL6 | Interleukin-6/G-CSF/MGF family | P05231 |
| PF00520 | Ion_trans | Ion transport protein | Q9UQD0 |
| PF00552 | IN_DBD_C | Integrase DNA binding domain | Q72498 |
| PF00605 | IRF | Interferon regulatory factor transcription factor | Q15306 |
| PF00612 | IQ | IQ calmodulin-binding motif | Q9UQD0 |
| PF00707 | IF3_C | Translation initiation factor IF-3, C-terminal domain | Q9I0A0 |
| PF00714 | IFN-gamma | Interferon gamma | P01579 |
| PF00715 | IL2 | Interleukin 2 | P60568 |
| PF00726 | IL10 | Interleukin 10 | P22301 |
| PF00727 | IL4 | Interleukin 4 | P05112 |
| PF00817 | IMS | impB/mucB/samB family | Q9Y253 |
| PF00818 | Ice_nucleation | Ice nucleation protein repeat (2 copies) | P06620 |
| PF00857 | Isochorismatase | Isochorismatase domain | C9QZ65 |
| PF00876 | Innexin | Innexin | Q9JIP4 |
| PF00904 | Involucrin | Involucrin repeat | |
| PF00920 | ILVD_EDD_N | Dihydroxy-acid/6-phosphogluconate dehydratase N-terminal | A0A4R3LQ44 |
| PF01007 | IRK | Inward rectifier potassium channel transmembrane domain | P63252 |
| PF01008 | IF-2B | Initiation factor 2 subunit family | Q9UI10 |
| PF01128 | IspD | 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase | Q743W5 |
| PF01156 | IU_nuc_hydro | Inosine-uridine preferring nucleoside hydrolase | A2EYV3 |
| PF01231 | IDO | Indoleamine 2,3-dioxygenase | P14902 |
| PF01348 | Intron_maturas2 | Type II intron maturase | P0A3U0 |
| PF01378 | IgG_binding_B | B domain | P19909 |
| PF01415 | IL7 | Interleukin 7 | P13232 |
| PF01485 | IBR | IBR domain, a half RING-finger domain | O95376 |
| PF01608 | I_LWEQ | I/LWEQ domain | Q9Y490 |
| PF01614 | IclR_C | Bacterial transcriptional regulator IclR C-terminal | Q9I2A1 |
| PF01652 | IF4E | Eukaryotic initiation factor 4E | P06730 |
| PF01658 | Inos-1-P_synth | Myo-inositol-1-phosphate synthase | Q8A7J8 |
| PF01695 | IstB_IS21 | IstB-like ATP binding protein | P0AEF0 |
| PF01715 | IPPT | IPP transferase | P16384 |
| PF01745 | IPT | Isopentenyl transferase | P58758 |
| PF01749 | IBB | Importin beta binding domain | P52293 |
| PF02022 | Integrase_Zn | Integrase Zinc binding domain | P35956 |
| PF02025 | IL5 | Interleukin 5 | P05113 |
| PF02059 | IL3 | Interleukin-3 | P08700 |
| PF02060 | ISK_Channel | Slow voltage-gated potassium channel | Q9Y6H6 |
| PF02121 | IP_trans | Phosphatidylinositol transfer protein | P53812 |
| PF02174 | IRS | PTB domain (IRS-1 type) | P35568 |
| PF02189 | ITAM | Immunoreceptor tyrosine-based activation motif | P15530 |
| PF02372 | IL15 | Interleukin 15 | A0A4D6NYT7 |
| PF02387 | IncFII_repA | IncFII RepA protein family | |
| PF02394 | IL1_propep | Interleukin-1 propeptide | |
| PF02920 | Integrase_DNA | DNA binding domain of tn916 integrase | P22886 |
| PF02974 | Inh | Protease inhibitor Inh | Q2YLR6 |
| PF03039 | IL12 | Interleukin-12 alpha subunit | P29459 |
| PF03278 | IpaB_EvcA | IpaB/EvcA family | Q9AJW7 |
| PF03398 | Ist1 | Regulator of Vps4 activity in the MVB pathway | P53990 |
| PF03487 | IL13 | Interleukin-13 | Q0PW92 |
| PF03488 | Ins_beta | Nematode insulin-related peptide beta type | P56174 |
| PF03519 | Invas_SpaK | Invasion protein B family | P35530 |
| PF03770 | IPK | Inositol polyphosphate kinase | Q8NFU5 |
| PF03810 | IBN_N | Importin-beta N-terminal domain | Q8TEX9 |
| PF03921 | ICAM_N | Intercellular adhesion molecule (ICAM), N-terminal domain | P05362 |
| PF03941 | INCENP_ARK-bind | Inner centromere protein, ARK binding region | Q9NQS7 |
| PF03971 | IDH | Monomeric isocitrate dehydrogenase | Q9I0L4 |
| PF03995 | Inhibitor_I36 | Peptidase inhibitor family I36 | P01077 |
| PF04120 | Iron_permease | Low affinity iron permease | |
| PF04140 | ICMT | Isoprenylcysteine carboxyl methyltransferase (ICMT) family | D6WJ77 |
| PF04179 | Init_tRNA_PT | Rit1 DUSP-like domain | |
| PF04183 | IucA_IucC | IucA / IucC family | A0A1Q5L7T0 |
| PF04227 | Indigoidine_A | Indigoidine synthase A like protein | P33025 |
| PF04279 | IspA | Intracellular septation protein A | |
| PF04362 | Iron_traffic | Bacterial Fe(2+) trafficking | Q3JQJ0 |
| PF04568 | IATP | Mitochondrial ATPase inhibitor, IATP | P01096 |
| PF04629 | ICA69 | Islet cell autoantigen ICA69, C-terminal domain | |
| PF04741 | InvH | InvH outer membrane lipoprotein | P0CL43 |
| PF04760 | IF2_N | Translation initiation factor IF-2, N-terminal region | Q9HV55 |
| PF04836 | IFRD_C | Interferon-related protein conserved region | Q9VQI5 |
| PF04979 | IPP-2 | Protein phosphatase inhibitor 2 (IPP-2) | Q9DCL8 |
| PF05004 | IFRD | Interferon-related developmental regulator (IFRD) | Q9VQI5 |
| PF05046 | Img2 | Mitochondrial large subunit ribosomal protein (Img2) | Q13405 |
| PF05049 | IIGP | Interferon-inducible GTPase (IIGP) | Q3T9E4 |
| PF05198 | IF3_N | Translation initiation factor IF-3, N-terminal domain | A0A024RDQ7 |
| PF05315 | ICEA | ICEA Protein | |
| PF05689 | InvE_AD | Adhesion domain | A0A0U1R0I0 |
| PF05760 | IER | Immediate early response protein (IER) | |
| PF05770 | Ins134_P3_kin | Inositol 1,3,4-trisphosphate 5/6-kinase ATP-grasp domain | Q84Y01 |
| PF05862 | IceA2 | Helicobacter pylori IceA2 protein | A0A0B2EID0 |
| PF05922 | Inhibitor_I9 | Peptidase inhibitor I9 | Q8NBP7 |
| PF05925 | IpgD | Enterobacterial virulence protein IpgD | |
| PF06083 | IL17 | Interleukin-17 | Q16552 |
| PF06090 | Ins_P5_2-kin | Inositol-pentakisphosphate 2-kinase | Q93YN9 |
| PF06135 | IreB | IreB regulatory phosphoprotein | P60357 |
| PF06140 | Ifi-6-16 | Interferon-induced 6-16 family | Q96BM0 |
| PF06246 | Isy1 | Isy1-like splicing family | Q9ULR0 |
| PF06384 | ICAT | Beta-catenin-interacting protein ICAT | Q9NSA3 |
| PF06415 | iPGM_N | BPG-independent PGAM N-terminus (iPGM_N) | Q5HHP2 |
| PF06437 | ISN1 | IMP-specific 5'-nucleotidase | A0A144A134 |
| PF06668 | ITI_HC_C | Inter-alpha-trypsin inhibitor heavy chain C-terminus | |
| PF06744 | IcmF_C | Type VI secretion protein IcmF C2-like domain | B7LFU0 |
| PF06757 | Ins_allergen_rp | Insect allergen related repeat, nitrile-specifier detoxification | Q8T5C5 |
| PF06761 | IcmF-related | Intracellular multiplication and human macrophage-killing | B7LFU0 |
| PF06776 | IalB | Invasion associated locus B (IalB) protein | A0A0H3LVG3 |
| PF06812 | ImpA_N | ImpA, N-terminal, type VI secretion system | A0A376XSV1 |
| PF06994 | Involucrin2 | Involucrin | |
| PF07024 | ImpE | ImpE protein | Q9I746 |
| PF07095 | IgaA | Intracellular growth attenuator protein IgaA | |
| PF07140 | IFNGR1_D2 | Interferon gamma receptor (IFNGR1), D2 domain | P15260 |
| PF07281 | INSIG | Insulin-induced protein (INSIG) | Q9Y5U4 |
| PF07334 | IFP_35_N | Interferon-induced 35 kDa protein (IFP 35) N-terminus | |
| PF07400 | IL11 | Interleukin 11 | P20809 |
| PF07679 | I-set | Immunoglobulin I-set domain | P15530 |
| PF07791 | Imm11 | Immunity protein family (Imm11) | |
| PF07826 | IMP_cyclohyd | IMP cyclohydrolase-like protein | O27099 |
| PF07885 | Ion_trans_2 | Ion channel | Q81HW2 |
| PF07965 | Integrin_B_tail | Integrin beta tail domain | P05107 |
| PF07979 | Intimin_C | Intimin C-type lectin domain | P43261 |
| PF08046 | IlvGEDA_leader | IlvGEDA operon leader peptide | |
| PF08049 | IlvB_leader | IlvB leader peptide | |
| PF08193 | INO80_Ies4 | INO80 complex subunit Ies4 | G0SDE9 |
| PF08246 | Inhibitor_I29 | Cathepsin propeptide inhibitor domain (I29) | P43235 |
| PF08364 | IF2_assoc | Bacterial translation initiation factor IF-2 associated region | Q9HV55 |
| PF08365 | IGF2_C | Insulin-like growth factor II E-peptide | |
| PF08397 | IMD | IRSp53/MIM homology domain | C7FZZ0 |
| PF08412 | Ion_trans_N | Ion transport protein N-terminal | Q9TV66 |
| PF08426 | ICE2 | ICE2 | |
| PF08441 | Integrin_A_Ig_1 | Integrin alpha Ig-like domain 1 | P06756 |
| PF08466 | IRK_N | Inward rectifier potassium channel N-terminal | P63252 |
| PF08574 | Iwr1 | Transcription factor Iwr1 | |
| PF08709 | Ins145_P3_rec | Inositol 1,4,5-trisphosphate/ryanodine receptor | P29994 |
| PF08725 | Integrin_b_cyt | Integrin beta cytoplasmic domain | P18084 |
| PF08816 | Ivy | Inhibitor of vertebrate lysozyme (Ivy) | Q9HXB1 |
| PF08858 | IDEAL | IDEAL domain | Q81SV3 |
| PF09134 | Invasin_D3 | Invasin, domain 3 | A0A0U1R0I0 |
| PF09238 | IL4Ra_N | Interleukin-4 receptor alpha chain, N-terminal | P24394 |
| PF09240 | IL6Ra-bind | Interleukin-6 receptor alpha chain, binding | P31785 |
| PF09294 | Interfer-bind | Interferon-alpha/beta receptor, fibronectin type III | O35228 |
| PF09394 | Inhibitor_I42 | Chagasin family peptidase inhibitor I42 | Q6KCA4 |
| PF09599 | IpaC_SipC | Salmonella-Shigella invasin protein C (IpaC_SipC) | |
| PF09779 | Ima1_N | Ima1 N-terminal domain | |
| PF09951 | Imm33 | Immunity protein Imm33 domain | |
| PF10189 | Ints3_N | Integrator complex subunit 3 N-terminal | Q68E01 |
| PF10281 | Ish1 | Putative nuclear envelope organisation protein | |
| PF10300 | Iml2-TPR_39 | Iml2/Tetratricopeptide repeat protein 39 | |
| PF10311 | Ilm1 | Increased loss of mitochondrial DNA protein 1 | |
| PF10401 | IRF-3 | Interferon-regulatory factor 3 | P70671 |
| PF10420 | IL12p40_C | Cytokine interleukin-12p40 C-terminus | P43432 |
| PF10430 | Ig_Tie2_1 | Tie-2 Ig-like domain 1 | Q02763 |
| PF10466 | Inhibitor_I34 | Saccharopepsin inhibitor I34 | P01094 |
| PF10467 | Inhibitor_I48 | Peptidase inhibitor clitocypin | Q3Y9I4 |
| PF10468 | Inhibitor_I68 | Carboxypeptidase inhibitor I68 | Q5EPH2 |
| PF10480 | ICAP-1_inte_bdg | Beta-1 integrin binding protein | O14713 |
| PF10498 | IFT57 | Intra-flagellar transport protein 57 | Q2XQY7 |
| PF10583 | Involucrin_N | Involucrin of squamous epithelia N-terminus | |
| PF10634 | Iron_transport | Fe2+ transport protein | A0A4R2M5S2 |
| PF10688 | Imp-YgjV | Bacterial inner membrane protein | |
| PF11261 | IRF-2BP1_2 | Interferon regulatory factor 2-binding protein zinc finger | |
| PF11417 | Inhibitor_G39P | Loader and inhibitor of phage G40P | Q38151 |
| PF11480 | ImmE5 | Colicin-E5 Imm protein | P13476 |
| PF11550 | IglC | Intracellular growth locus C protein | Q5NEC5 |
| PF11555 | Inhibitor_Mig-6 | EGFR receptor inhibitor Mig-6 | Q9UJM3 |
| PF11720 | Inhibitor_I78 | Peptidase inhibitor I78 family | Q4WZ11 |
| PF11727 | ISG65-75 | Invariant surface glycoprotein | Q587F5 |
| PF11798 | IMS_HHH | IMS family HHH motif | Q9UBT6 |
| PF11799 | IMS_C | impB/mucB/samB family C-terminal domain | Q9Y253 |
| PF11837 | INV_N | Beta-fructofuranosidase, N-terminal domain | |
| PF11924 | IAT_beta | Inverse autotransporter, beta-domain | P43261 |
| PF11987 | IF-2 | Translation-initiation factor 2 | Q9UZK7 |
| PF11999 | Ice_binding | Ice-binding-like | H7FWB6 |
| PF12178 | INCENP_N | Chromosome passenger complex (CPC) protein INCENP N terminal | Q9NQS7 |
| PF12179 | IKKbetaNEMObind | I-kappa-kinase-beta NEMO binding domain | O14920 |
| PF12185 | IR1-M | Nup358/RanBP2 E3 ligase domain | A0A1L8HGL2 |
| PF12257 | IML1 | Vacuolar membrane-associated protein Iml1, N-terminal domain | O75140 |
| PF12314 | IMCp | Inner membrane complex protein | |
| PF12317 | IFT46_B_C | Intraflagellar transport complex B protein 46 C terminal | A2T2X4 |
| PF12333 | Ipi1_N | Rix1 complex component involved in 60S ribosome maturation | A6ZSZ4 |
| PF12354 | Internalin_N | Bacterial adhesion/invasion protein N terminal | P0DQD2 |
| PF12421 | Ig_GpJ_C | Tip attachment protein J, C-terminal receptor binding domain | |
| PF12432 | INTS1_RP2B-bd | Integrator complex subunit 1, RP2B-binding domain | Q8N201 |
| PF12559 | Inhibitor_I10 | Serine endopeptidase inhibitors | B2G3C8 |
| PF12595 | iRhom1-2_N | Inactive rhomboid proteins 1/2, N-terminal | |
| PF12628 | Inhibitor_I71 | Falstatin, cysteine peptidase inhibitor | |
| PF12634 | Inp1 | Inheritance of peroxisomes protein 1 | |
| PF12735 | IgD3_Trs65 | TRAPP trafficking subunit Trs65 IgD3 | P32893 |
| PF12835 | Integrase_1 | Integrase | |
| PF12998 | ING | Inhibitor of growth proteins N-terminal histone-binding | P38806 |
| PF13009 | Integrase_2 | Putative integrase | |
| PF13734 | Inhibitor_I69 | Spi protease inhibitor | P0C0J0 |
| PF13895 | Ig_2 | Immunoglobulin domain | Q26261 |
| PF13927 | Ig_3 | Immunoglobulin domain | P35613 |
| PF13956 | Ibs_toxin | Toxin Ibs, type I toxin-antitoxin system | |
| PF14331 | IcmF-related_N | IcmF-related N-terminal domain | |
| PF14373 | Imm_superinfect | Superinfection immunity protein | |
| PF14423 | Imm5 | Immunity protein Imm5 | A0A3M2XVH3 |
| PF14425 | Imm3 | Immunity protein Imm3 | |
| PF14426 | Imm2 | Immunity protein Imm2 | |
| PF14430 | Imm1 | Immunity protein Imm1 | A0A1V6L5G6 |
| PF14434 | Imm6 | Immunity protein Imm6 | |
| PF14565 | IL22 | Interleukin 22 IL-10-related T-cell-derived-inducible factor | Q9JJY9 |
| PF14612 | Ino80_Iec3 | IEC3 subunit of the Ino80 complex, chromatin re-modelling | |
| PF14653 | IGFL | Insulin growth factor-like family | |
| PF14750 | INTS2 | Integrator complex subunit 2 | Q9H0H0 |
| PF14837 | INTS5_N | Integrator complex subunit 5 N-terminus | Q6P9B9 |
| PF14838 | INTS5_C | Integrator complex subunit 5 C-terminus | Q6P9B9 |
| PF14882 | INT_rpt | Integrase repeat unit | |
| PF14890 | Intein_splicing | Intein splicing domain | H3ZKG9 |
| PF14931 | IFT20 | Intraflagellar transport complex B, subunit 20 | Q8LLV9 |
| PF14964 | INTS15 | Integrator complex subunit 15 | |
| PF15005 | IZUMO | Izumo sperm-egg fusion, Ig domain-associated | Q8IYV9 |
| PF15018 | InaF-motif | TRP-interacting helix | |
| PF15036 | IL34 | Interleukin 34 | Q8R1R4 |
| PF15037 | IL17_R_N | Interleukin-17 receptor extracellular region | Q8NAC3 |
| PF15095 | IL33_bt | Interleukin 33 | Q8BVZ5 |
| PF15097 | Ig_J_chain | Immunoglobulin J chain | P01591 |
| PF15142 | INCA1 | INCA1 | |
| PF15157 | IQCJ-SCHIP1 | Fusion protein IQCJ-SCHIP1 with IQ-like motif | |
| PF15177 | IL28A | Interleukin-28A | Q8IZI9 |
| PF15209 | IL31 | Interleukin 31 | |
| PF15225 | IL32 | Interleukin 32 | |
| PF15300 | INT_SG_DDX_CT_C | INTS6/SAGE1/DDX26B/CT45 C-terminus | Q9UL03 |
| PF15305 | IFT43 | Intraflagellar transport protein 43 | Q96FT9 |
| PF15428 | Imm26 | Immunity protein 26 | |
| PF15560 | Imm12 | Immunity protein 12 | |
| PF15561 | Imm15 | Immunity protein 15 | |
| PF15562 | Imm17 | Immunity protein 17 | |
| PF15563 | Imm19 | Immunity protein 19 | |
| PF15564 | Imm25 | Immunity protein 25 | |
| PF15565 | Imm30 | Immunity protein 30 | |
| PF15566 | Imm32 | Immunity protein 32 | |
| PF15567 | Imm35 | Immunity protein 35 | |
| PF15568 | Imm39 | Immunity protein 39 | |
| PF15569 | Imm40 | Immunity protein 40 | |
| PF15570 | Imm43 | Immunity protein 43 | |
| PF15571 | Imm44 | Immunity protein 44 | |
| PF15572 | Imm45 | Immunity protein 45 | |
| PF15573 | Imm47 | Immunity protein 47 | |
| PF15574 | Imm48 | Immunity protein 48 | |
| PF15575 | Imm49 | Immunity protein 49 | |
| PF15579 | Imm52 | Immunity protein 52 | Q9HXA5 |
| PF15580 | Imm53 | Immunity protein 53 | |
| PF15581 | Imm58 | Immunity protein 58 | |
| PF15582 | Imm65 | Immunity protein 65 | |
| PF15583 | Imm68 | Immunity protein 68 | |
| PF15584 | Imm72 | Immunity protein 72 | |
| PF15585 | Imm7 | Immunity protein 7 | |
| PF15586 | Imm8 | Immunity protein 8 | |
| PF15587 | Imm9 | Immunity protein 9 | |
| PF15588 | Imm10 | Immunity protein 10 | |
| PF15589 | Imm21 | Immunity protein 21 | |
| PF15590 | Imm27 | Immunity protein 27 | |
| PF15591 | Imm31 | Immunity protein 31 | |
| PF15592 | Imm41 | Immunity protein 41 | |
| PF15593 | Imm42 | Immunity protein 42 | |
| PF15594 | Imm50 | Immunity protein 50 | |
| PF15595 | Imm51 | Immunity protein 51 | |
| PF15596 | Imm57 | Immunity protein 57 | |
| PF15597 | Imm59 | Immunity protein 59 | |
| PF15598 | Imm61 | Immunity protein 61 | O05443 |
| PF15599 | Imm63 | Immunity protein 63 | |
| PF15600 | Imm64 | Immunity protein 64 | |
| PF15601 | Imm70 | Immunity protein 70 | |
| PF15602 | Imm71 | Immunity protein 71 | |
| PF15603 | Imm74 | Immunity protein 74 | |
| PF15631 | Imm-NTF2-2 | NTF2 fold immunity protein | |
| PF15655 | Imm-NTF2 | NTF2 fold immunity protein | |
| PF15711 | ILEI | Interleukin-like EMT inducer | Q9UHN6 |
| PF15761 | IMUP | Immortalisation up-regulated protein | |
| PF15771 | IHO1 | Interactor of HORMAD1 protein 1 | |
| PF15874 | Il2rg | Putative Interleukin 2 receptor, gamma chain | |
| PF15907 | Itfg2 | Integrin-alpha FG-GAP repeat-containing protein 2 | |
| PF16070 | Ig_TMEM132_4th | TMEM132 fourth domain | |
| PF16174 | IHABP4_N | Intracellular hyaluronan-binding protein 4 N-terminal | G1SW77 |
| PF16453 | IQ_SEC7_PH | PH domain | Q6DN90 |
| PF16556 | IL17R_fnIII_D1 | Interleukin-17 receptor, fibronectin-III-like domain 1 | Q96F46 |
| PF16578 | IL17R_fnIII_D2 | Interleukin 17 receptor D | Q96F46 |
| PF16617 | INTAP | Intersectin and clathrin adaptor AP2 binding region | Q15811 |
| PF16625 | ISET-FN3_linker | Unstructured linking region I-set and fnIII on Brother of CDO | |
| PF16649 | IL23 | Interleukin 23 subunit alpha | Q9NPF7 |
| PF16680 | Ig_4 | T-cell surface glycoprotein CD3 delta chain | P04234 |
| PF16681 | Ig_5 | Ig-like domain on T-cell surface glycoprotein CD3 epsilon chain | P07766 |
| PF16706 | Izumo-Ig | Izumo-like Immunoglobulin domain | Q8IYV9 |
| PF16718 | IFS | Immunity factor for SPN | A0A0H2UT30 |
| PF16742 | IL17R_D_N | N-terminus of interleukin 17 receptor D | |
| PF16748 | INSC_LBD | Inscuteable LGN-binding domain | Q1MX18 |
| PF16776 | INPP5B_PH | Type II inositol 1,4,5-trisphosphate 5-phosphatase PH domain | Q8K337 |
| PF16850 | Inhibitor_I66 | Peptidase inhibitor I66 | D0EWJ0 |
| PF16928 | Inj_translocase | DNA/protein translocase of phage P22 injectosome | |
| PF17091 | Inovirus_G7P_1 | Inovirus G7P protein | |
| PF17335 | IES5 | Ino80 complex subunit 5 | |
| PF17517 | IgGFc_binding | IgGFc binding protein | |
| PF17626 | IncF | Inclusion membrane protein F | |
| PF17627 | IncE | Inclusion membrane protein E | |
| PF17628 | IncD | Inclusion membrane protein D | |
| PF17655 | IRK_C | Inward rectifier potassium channel C-terminal domain | P63252 |
| PF17722 | IFTAP | Intraflagellar transport-associated protein | |
| PF17736 | Ig_C17orf99 | C17orf99 Ig domain | |
| PF17737 | Ig_C19orf38 | Ig domain in C19orf38 (HIDE1) | |
| PF17753 | Ig_mannosidase | Ig-fold domain | Q8AAK6 |
| PF17870 | Insulin_TMD | Insulin receptor trans-membrane segment | P15208 |
| PF17921 | Integrase_H2C2 | Integrase zinc binding domain | Q99315 |
| PF17927 | Ins134_P3_kin_N | Inositol 1,3,4-trisphosphate 5/6-kinase pre-ATP-grasp domain | Q84Y01 |
| PF18001 | Il13Ra_Ig | Interleukin-13 receptor subunit alpha Ig-like domain | P78552 |
| PF18045 | ISP3_C | ISP3 C-terminal | B9PJE6 |
| PF18161 | ISP1_C | ISP1 C-terminal | B9PKK4 |
| PF18203 | IPTL-CTERM | IPTL-CTERM motif | |
| PF18324 | Isocitrate_DH_C_bact | Bacterial isocitrate dehydrogenase, C-terminal domain | P33197 |
| PF18368 | Ig_GlcNase | Exo-beta-D-glucosaminidase Ig-fold domain | Q56F26 |
| PF18372 | I-EGF_1 | Integrin beta epidermal growth factor like domain 1 | P05106 |
| PF18383 | IFT81_CH | Intraflagellar transport 81 calponin homology domain | Q68RJ5 |
| PF18397 | IKBKB_SDD | IQBAL scaffold dimerization domain | O15111 |
| PF18452 | Ig_6 | Immunoglobulin domain | O95256 |
| PF18543 | ID | Intracellular delivery domain | Q6G2A9 |
| PF18590 | IMP2_N | Immune Mapped Protein 2 (IMP2) N-terminal domain | Q8IBF5 |
| PF18591 | IMP2_C | Immune Mapped Protein 2 (IMP2) C-terminal domain | Q8IBF5 |
| PF18611 | IL3Ra_N | IL-3 receptor alpha chain N-terminal domain | P26951 |
| PF18642 | IMPa_helical | Immunomodulating metalloprotease helical domain | Q9I5W4 |
| PF18650 | IMPa_N_2 | Immunomodulating metalloprotease N-terminal domain | Q9I5W4 |
| PF18673 | IrmA | interleukin receptor mimic protein A | A0A0H2VAX3 |
| PF18706 | ISPD_C | D-ribitol-5-phosphate cytidylyltransferase C-terminal domain | A4D126 |
| PF18707 | IL2RB_N1 | Interleukin-2 receptor subunit beta N-terminal domain 1 | P14784 |
| PF18773 | Importin_rep | Importin 13 repeat | Q9VEC5 |
| PF18783 | IPU_b_solenoid | Isopullulanase beta-solenoid repeat | A0A4V8H044 |
| PF18785 | Inv-AAD | Invertebrate-AID/APOBEC-deaminase | Q2UFA9 |
| PF18786 | Importin_rep_2 | Importin 13 repeat | O94829 |
| PF18806 | Importin_rep_3 | Importin 13 repeat | Q9VEC5 |
| PF18808 | Importin_rep_4 | Importin repeat | O00410 |
| PF18816 | Importin_rep_5 | Importin repeat | O00410 |
| PF18823 | InPase | Inorganic Pyrophosphatase | |
| PF18829 | Importin_rep_6 | Importin repeat 6 | O00410 |
| PF18981 | InlK_D3 | Internalin K domain (D3/D4) | Q8Y7I7 |
| PF19031 | Intu_longin_1 | First Longin domain of INTU, CCZ1 and HPS4 | G0SD94 |
| PF19032 | Intu_longin_2 | Intu longin-like domain 2 | Q059U7 |
| PF19033 | Intu_longin_3 | Intu longin-like domain 3 | Q059U7 |
| PF19081 | Ig_7 | Ig-like domain CHU_C associated | |
| PF19427 | Insc_C | Protein inscuteable C-terminal | Q24367 |
| PF19435 | IntS14_b-barrel | Integrator complex subunit 14, beta-barrel domain | Q96SY0 |
| PF19532 | Ig_TMEM131L_2nd | Transmembrane protein 131-like, second Ig-like domain | |
| PF19978 | Inovirus_G7P_2 | Tail virion protein G7P | |
| PF19995 | iSTAND | inactive STAND | |
| PF19996 | ivWA-helical_N | N-terminal helical region fused to the FtsH ternary system vWA domain | |
| PF19997 | ivWA | vWA domain found in the FtsH ternary systems | |
| PF20141 | Island | Brassinosteroid receptor island domain | O22476 |
| PF20504 | IntS14_C | Integrator complex subunit 14, alpha-helical domain | Q96SY0 |
| PF20634 | IFNGR1_transm | Interferon gamma receptor 1, transmembrane region | |
| PF20773 | InhA-like_MAM | Immune inhibitor A-like, MAM domain | |
| PF20774 | InhA-like_VEG | Immune inhibitor A-like metallopeptidase, VEG domain | |
| PF20805 | Integrin_A_Ig_2 | Integrin alpha Ig-like domain 2 | |
| PF20806 | Integrin_A_Ig_3 | Integrin alpha Ig-like domain 3 | |
| PF20838 | IgD_del_linker | Immunoglobulin D, delta linker region | |
| PF20861 | Isd_H_B_linker | Iron-regulated surface determinant protein H/B, linker domain | |
| PF20863 | IcmR | IcmR, middle region | |
| PF20987 | I-TevI_DNA-bd | Intron-encoded endonuclease 1, DNA-binding domain | |
| PF21045 | INT10 | Integrator subunit 10 | |
| PF21070 | IcmF_helical | Type VI secretion protein IcmF helical domain | |
| PF21146 | ICAM1_3_5_D2 | ICAM-1/3/5, D2 domain | |
| PF21156 | ISOA1-3_C | Isoamylase 1-3, C-terminal | |
| PF21178 | Itf52_C | Intraflagellar transport protein 52, C-terminal domain | |
| PF21331 | Isoamylase_C | Isoamylase, C-terminal | |
| PF21382 | IntS9_C | Integrator IntS9, C-terminal domain | |
| PF21386 | IntS11_C | Integrator IntS11, C-terminal domain | |
| PF21390 | Irp3-like_C | Thiazolinyl imine reductase Irp3-like, C-terminal | |
| PF21459 | INI1_DNA-bd | SWI/SNF Subunit INI1, DNA binding domain | |
| PF21460 | IL3Rb_N | GM-CSF/IL-3/IL-5 receptor common beta subunit, N-terminal | |
| PF21485 | IF5A-like_N | Translation initiation factor 5A-like, N-terminal | |
| PF21520 | ITGAX-like_Ig_3 | Integrin alpha-X-like, Ig-like domain 3 | |
| PF21729 | IRX15_IRX15L_GXM | IRX15/IRX15L/GXM | |
| PF21764 | Invasin_D4 | Invasin, domain 4 | |
| PF21805 | Imm5_like | Imm-5 like putative immunity protein | |
| PF21999 | IMS_HHH_1 | DNA polymerase-iota, thumb domain | |
| PF22083 | I-HmuI_NUMOD-like | DNA endonuclease I-HmuI-like, NUMOD-like domain | |
| PF22122 | InlK_D2 | Internalin K domain D2 | |
| PF22191 | IBR_1 | IBR domain | |
| PF22240 | ISP_coupler | Type ISP restriction-modification enzyme, coupler domain | |
| PF22350 | Int_EF-hand | Internalin, EF-hand domain | |
| PF22361 | IglE_N | IglE, N-terminal domain | |
| PF22508 | InlJ_IG | Internalin J, Immunoglobulin-like domain | |
| PF22563 | iREC | Inactive Receiver domain | |
| PF22605 | IBR_2 | IBR domain | |
| PF22615 | IPMS_D2 | Alpha-isopropylmalate synthase, post-catalytic domain-like | |
| PF22859 | IBIN | Induced by infection | |
| PF22927 | INT1_R3 | Integrator complex subunit 1, R3 domain | |
| PF22928 | INTS1_R4 | Integrator complex subunit 1, R4 domain | |
| PF22929 | INTS1_INTS2-bd | Integrator complex subunit 1, INTS2-binding domain | |
| PF22938 | Integrase_p58_C | Integrase p58, C-terminal domain | |
| PF22959 | Ig_NUP210_15th | NUP210 Ig-like domain 15 | |
| PF22962 | Ig_NUP210_7th | NUP210 Ig-like domain 7 | |
| PF22963 | Ig_NUP210_3rd | NUP210 Ig-like domain 3 | |
| PF22965 | INTS7_C | Integrator complex subunit 7, C-terminal domain | |
| PF22966 | INTS7_C_plants | Integrator complex subunit 7, C-terminal domain in plants | |
| PF22967 | Ig_NUP210_1st | NUP210 Ig-like domain 1 | |
| PF22969 | Ig_NUP210_2nd | NUP210 Ig-like domain 2 | |
| PF22971 | Ig_VEGFR-1-like_5th | VEGFR-1-like, immunoglobulin-like domain | |
| PF23013 | IML1_N | IML1 N-terminal double psi beta barrel domain | |
| PF23130 | IcmW | IcmW | |
| PF23141 | Ig_NOMO | NOMO Ig-like domain | |
| PF23166 | Ig_N_CWD1 | Alpha-glucan water dikinase 1 Ig-like N-terminal domain | |
| PF23197 | IG_AIR9 | AIR9 A9 domain | |
| PF23209 | IDM1_C | Increased DNA methylation 1, C-terminal | |
| PF23265 | Ig-like_KY | KY-like, immunoglobulin-like domain | |
| PF23277 | Ig_Dlec1_1 | Deleted in lung and esophageal cancer protein 1 Ig domain | |
| PF23316 | Ig_DLEC1_6th | DLEC1 sixth Ig-like domain | |
| PF23352 | IFT52_central | IFT52 central domain | |
| PF23355 | IFT52_GIFT | IFT52 GIFT domain | |
| PF23481 | Ig_TMEM132_2nd | TMEM132 second Ig-like domain | |
| PF23486 | Ig_TMEM132_5th | TMEM132 fifth domain | |
| PF23487 | Ig_TMEM132_6th | TMEM132 sixth domain | |
| PF23604 | Ig_TRAPPC10 | TRAPPC10-like, immunoglobulin-like | |
| PF23608 | Ig_ILCR1 | ILCR1 Ig-like domain | |
| PF23616 | Ig_GEX2_N | GEX2 N-terminal Ig-like domain | |
| PF23619 | Ig_VWA7 | VWA7 Ig-like domain | |
| PF23645 | IgD1_Trs65 | TRAPP trafficking subunit Trs65 IgD1 | |
| PF23646 | IgD2_Trs65 | TRAPP trafficking subunit Trs65 IgD2 | |
| PF23664 | Ig_Pom152 | Nucleoporin pom152-like, immunoglobulin-like domain | |
| PF23736 | Ig_ZP2 | Zona pellucida sperm-binding protein 2, Ig-like domain | |
| PF23738 | Ig_ZP2_N | Zona pellucida sperm-binding protein 2, Ig-like domain | |
| PF23740 | Ig_ZP2_3rd | Zona pellucida sperm-binding protein 2, Ig-like domain | |
| PF23747 | Ig-like_CATSPERD | CATSPERD Ig-like domain | |
| PF23755 | Ig-like_IP5PC_F | IP5P C-F Ig-like domain | |
| PF23892 | Ig_CycH | Cytochrome c-type biogenesis protein H Ig-like domain | |
| PF24025 | Ig_DR_A0283-like | DR_A0283-like, Ig-like domain | |
| PF24077 | IgA0_D2 | Immunoglobulin A1 protease autotransporter domain 2 | |
| PF24189 | Ig_RSC4 | RSC4 Ig-like domain | |
| PF24237 | INO80E | INO80 complex subunit E | |
| PF24244 | Iec3-like_M | INO80 complex subunit 3-like, middle region | |
| PF24245 | INO80F | INO80 complex subunit F | |
| PF24291 | Ig_CFAP65 | Cilia- and flagella-associated protein 65-like, Ig-like domain | |
| PF24309 | IMEF_Flp | IMEF cargo Flp protein | |
| PF24312 | Ig-like_POM152 | Nucleoporin POM152, Ig-like domain | |
| PF24384 | Ig_TMM62 | TMEM62 Ig-like domain | |
| PF24401 | iHD-CE | iHD-CE | |
| PF24402 | iHKD | Inactive HKD-Rease | |
| PF24403 | iSirtuin | Inactive Sirtuin | |
| PF24415 | Ig_Irg-7 | Irg-7-like, Ig-like domain | |
| PF24421 | Ig_J | Tip attachment protein J, Ig-like domain | |
| PF24425 | Ig_GP210_15th | Nuclear pore complex protein GP210, Ig-like domain | |
| PF24427 | Ig_GP210_16th | Nuclear pore complex protein GP210, Ig-like domain | |
| PF24436 | INTS7_N | Integrator complex subunit 7, N-terminal | |
| PF24437 | INTS7_HB | Integrator complex subunit 7 helical bundle | |
| PF24438 | IML1_N_fung | IML1, N-terminal, fungi | |
| PF24462 | Ig_F54D1_6 | F54D1.6, Ig-like domain | |
| PF24464 | Ig_F54D1_6_2 | F54D1.6, Ig-like domain | |
| PF24489 | Ig_J_second | Tip attachment protein J second Ig-like domain | |
| PF24493 | INTS4_8HBD | INTS4 8 helical bundle domain | |
| PF24495 | Ig_TMEM131_2 | Transmembrane protein 131 second Ig-like domain | |
| PF24498 | Ig_TMEM131L_3 | TMEM131L third Ig-like domain | |
| PF24499 | Ig_TMEM131L_4 | TMEM131L fourth Ig-like domain | |
| PF24501 | Ig_TMEM131L_5 | TMEM131L fifth Ig-like domain | |
| PF24502 | Ig_TMEM131homol_3rd | TMEM131 homolog third Ig-like domain | |
| PF24505 | Ig_TMEM131homol_6th | TMEM131 homolog sixth Ig-like domain | |
| PF24507 | Ig_CFAP65_4th | CFAP65, fourth Ig-like domain | |
| PF24518 | Ig_CD22 | B-cell receptor CD22-like, first Ig-like | |
| PF24519 | Ig-like_Pom152_1 | Nucleoporin pom152-like, first immunoglobulin-like domain | |
| PF24527 | Ig-like_Pom152_9 | Nucleoporin pom152-like, ninth immunoglobulin-like domain | |
| PF24528 | Ig_ADGRF3 | Adhesion G-protein coupled receptor F3-like, Ig-like domain | |
| PF24542 | Ig_TPPC8_C | TPPC8 C-terminal Ig-like domain | |
| PF24544 | Ig_TPPC8_3rd | TPPC8 third Ig-like domain | |
| PF24545 | Ig_TPPC8_2nd | TPPC8 second Ig-like domain | |
| PF24546 | Ig_TPPC8_4th | TPPC8 fourth Ig-like domain | |
| PF24576 | IR75A_N | Ionotropic receptor 75a N-terminal | |
| PF24584 | Ig_CYK3_C | CYK3 C-terminal Ig-like domain | |
| PF24609 | IQ_SCN5A_C | SCN5A-like, C-terminal IQ motif | |
| PF24612 | Ig_TgrO1 | TgrO1-like, immunoglobulin-like domain | |
| PF24619 | Ig_SibA | SibA-like, immunoglobulin-like domain | |
| PF24624 | Int_N | Phage integrase, N-terminal domain | |
| PF24719 | Imm33-like | Imm33-like domain | |
| PF24770 | Ig-CFAP74_2 | CFAP74 second Ig-like domain | |
| PF24771 | Ig_CFAP74_1st | CFAP74 first Ig-like domain | |
| PF24778 | Ig-CFAP74_3rd | CFAP74 third Ig-like domain | |
| PF24798 | Ig-CFAP74_4th | CFAP74 forth Ig-like domain | |
| PF24811 | Ig_Shg | DE-cadherin, Ig-like domain | |
| PF24816 | Ig_CFAP65__9th | Cilia- and flagella-associated protein 65-like, Ig-like domain | |