| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P63249 | cAMP-dependent protein kinase inhibitor alpha; PKI-alpha; cAMP-dependent protein kinase inhibitor, muscle/brain isoform; | Pkia; | NP_446224.1;XP_006232217.1;XP_006232218.1; | 76 | rat |
| P27775 | cAMP-dependent protein kinase inhibitor beta; PKI-beta; cAMP-dependent protein kinase inhibitor, testis isoform; | Pkib; | NULL | 71 | rat |
| Q99NI4 | Inositol polyphosphate multikinase; EC 2.7.1.151; Inositol 1,3,4,6-tetrakisphosphate 5-kinase; | Ipmk; Impk; | NP_599244.1; | 396 | rat |
| Q9JM04 | Importin-13; Imp13; Late gestation lung 2 protein; | Ipo13; Imp13 Lgl2; | NP_446230.1; | 963 | rat |
| P50411 | Protein phosphatase inhibitor 2; IPP-2; | Ppp1r2; Ipp2; | NP_620178.1; | 205 | rat |
| Q5PXE9 | Inositol-pentakisphosphate 2-kinase; EC 2.7.1.158; Inositol-1,3,4,5,6-pentakisphosphate 2-kinase; Ins(1,3,4,5,6)P5 2-kinase; InsP5 2-kinase; rIPK1; | Ippk; | NP_001008556.1; | 489 | rat |
| Q6AXQ7 | IQ and AAA domain-containing protein 1-like; Protein IQCA1P1; | Iqca1p1; Iqca1l; | NULL | 822 | rat |
| Q5XIR6 | IQ domain-containing protein D; | Iqcd; | NULL | 457 | rat |
| Q6AXX0 | IQ domain-containing protein F3; | Iqcf3; | NP_001020324.1; | 220 | rat |
| Q5PQQ6 | IQ domain-containing protein G; | Iqcg; | NP_001014252.1; | 419 | rat |
| Q76M68 | IQ motif and SEC7 domain-containing protein 3; Potential synaptic guanine nucleotide exchange factor for Arf; SynArfGEF-Po; | Iqsec3; Sag; | NP_997500.1; | 1194 | rat |
| Q45GW3 | IQ and ubiquitin-like domain-containing protein; Protein TRS4; | Iqub; | NP_001029302.1; | 790 | rat |
| P85007 | Immediate early response 3-interacting protein 1; | Ier3ip1; | NULL | 82 | rat |
| Q4QQS0 | Interleukin-1 receptor-associated kinase-like 2; IRAK-2; | Irak2; | NP_001020593.1; | 624 | rat |
| Q62751 | Iron-responsive element-binding protein 2; IRE-BP 2; Iron regulatory protein 2; IRP2; | Ireb2; Irp2; | NP_074054.2; | 963 | rat |
| P23570 | Interferon regulatory factor 1; IRF-1; | Irf1; | NP_036723.1; | 328 | rat |
| Q6AYC2 | Immunity-related GTPase family M protein; EC 3.6.5.-; | Irgm; | NP_001012007.1;XP_006246240.1; | 411 | rat |
| P59824 | Interleukin-1 receptor accessory protein-like 1; IL-1-RAPL-1; IL-1RAPL-1; IL1RAPL-1; X-linked interleukin-1 receptor accessory protein-like 1; | Il1rapl1; | NP_808796.1; | 696 | rat |
| P35570 | Insulin receptor substrate 1; IRS-1; pp185; | Irs1; Irs-1; | NP_037101.1; | 1235 | rat |
| Q80W96 | Iron-sulfur cluster assembly 1 homolog, mitochondrial; HESB-like domain-containing protein 2; Iron-sulfur assembly protein IscA; | Isca1; Hbld2; | NP_853657.1; | 129 | rat |
