| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q62655 | Transcription factor 4; TCF-4; Immunoglobulin transcription factor 2; ITF-2; RITF-2; R8f DNA-binding protein; SL3-3 enhancer factor 2; SEF-2; | Tcf4; Itf2 Sef2; | NP_445821.1; | 589 | rat |
| Q5M7W6 | Protein ITFG3; | Itfg3; | NP_001009701.1; | 552 | rat |
| Q5PQQ8 | Integrin beta-like protein 1; | Itgbl1; | NP_001017505.1; | 494 | rat |
| Q63416 | Inter-alpha-trypsin inhibitor heavy chain H3; ITI heavy chain H3; ITI-HC3; Inter-alpha-inhibitor heavy chain 3; | Itih3; | NP_059047.1; | 887 | rat |
| Q5XIE8 | Integral membrane protein 2B; Immature BRI2; imBRI2; Transmembrane protein BRI; Bri; [Cleaved into: BRI2, membrane form (Mature BRI2) (mBRI2); BRI2 intracellular domain (BRI2 ICD); BRI2C, soluble form; Bri23 peptide (Bri2-23) (ABri23) (C-terminal peptide)癷?癸 | Itm2b; | NP_001006964.1; | 266 | rat |
| Q5PQL7 | Integral membrane protein 2C; [Cleaved into: CT-BRI3]; | Itm2c; | NP_001009674.1; | 269 | rat |
| D3ZW55 | Inosine triphosphate pyrophosphatase; ITPase; Inosine triphosphatase; EC 3.6.1.19; Non-canonical purine NTP pyrophosphatase; Non-standard purine NTP pyrophosphatase; Nucleoside-triphosphate diphosphatase; Nucleoside-triphosphate pyrophosphatase; NTPase; | Itpa; | NP_001101244.1; | 198 | rat |
| P29994 | Inositol 1,4,5-trisphosphate receptor type 1; IP3 receptor isoform 1; IP-3-R; IP3R 1; InsP3R1; Type 1 inositol 1,4,5-trisphosphate receptor; Type 1 InsP3 receptor; | Itpr1; Insp3r; | NP_001257526.1; | 2750 | rat |
| P29995 | Inositol 1,4,5-trisphosphate receptor type 2; IP3 receptor isoform 2; IP3R 2; InsP3R2; Type 2 inositol 1,4,5-trisphosphate receptor; Type 2 InsP3 receptor; | Itpr2; | NP_112308.1; | 2701 | rat |
| Q63269 | Inositol 1,4,5-trisphosphate receptor type 3; IP3 receptor isoform 3; IP3R 3; InsP3R3; Type 3 inositol 1,4,5-trisphosphate receptor; Type 3 InsP3 receptor; | Itpr3; | NP_037270.1; | 2670 | rat |
| Q9WVE9 | Intersectin-1; EH domain and SH3 domain regulator of endocytosis 1; | Itsn1; Ehsh1 Itsn; | NP_062100.1; | 1217 | rat |
| P12007 | Isovaleryl-CoA dehydrogenase, mitochondrial; IVD; EC 1.3.8.4; | Ivd; | NP_036724.1; | 424 | rat |
| Q3SWT4 | Protein IWS1 homolog; IWS1-like protein; | Iws1; Iws1l; | NP_001030090.1;XP_006254634.1;XP_008770256.1; | 764 | rat |
| Q5BK17 | Iodotyrosine dehalogenase 1; IYD-1; EC 1.22.1.1; | Iyd; Dehal1; | NP_001020171.1; | 285 | rat |
| Q6AY06 | Izumo sperm-egg fusion protein 1; Oocyte binding/fusion factor; OBF; Sperm-specific protein izumo; | Izumo1; | NP_001017514.1;XP_008757628.1; | 383 | rat |
| Q63722 | Protein jagged-1; Jagged1; CD antigen CD339; | Jag1; | NP_062020.1; | 1219 | rat |
| P97607 | Protein jagged-2; Jagged2; Fragment; | Jag2; | NULL | 1202 | rat |
| Q4KM64 | Protein jagunal homolog 1; | Jagn1; | NP_001037737.1; | 183 | rat |
| Q62689 | Tyrosine-protein kinase JAK2; EC 2.7.10.2; Janus kinase 2; JAK-2; | Jak2; | NP_113702.1; | 1132 | rat |
| Q63272 | Tyrosine-protein kinase JAK3; EC 2.7.10.2; Janus kinase 3; JAK-3; | Jak3; | NULL | 1100 | rat |
