| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q9BH09 | Hepatocyte growth factor; Hepatopoietin-A; Scatter factor; SF; [Cleaved into: Hepatocyte growth factor alpha chain; Hepatocyte growth factor beta chain]; | HGF; | NP_001009830.1;XP_006929205.1; | 728 | cat |
| P12967 | Islet amyloid polypeptide; Amylin; | IAPP; | NP_001036803.1; | 89 | cat |
| P35849 | Interferon alpha; IFN-alpha; | NULL | NP_001009197.2; | 194 | cat |
| Q9N2J0 | Interferon beta; IFN-beta; | IFNB1; IFNB; | NP_001009297.1; | 186 | cat |
| P46402 | Interferon gamma; IFN-gamma; | IFNG; | NP_001009873.1; | 167 | cat |
| P55029 | Interleukin-10; IL-10; Cytokine synthesis inhibitory factor; CSIF; | IL10; | NP_001009209.1; | 178 | cat |
| O02743 | Interleukin-12 subunit alpha; IL-12A; Cytotoxic lymphocyte maturation factor 35 kDa subunit; CLMF p35; IL-12 subunit p35; | IL12A; | NP_001009833.1; | 222 | cat |
| O02744 | Interleukin-12 subunit beta; IL-12B; Cytotoxic lymphocyte maturation factor 40 kDa subunit; CLMF p40; IL-12 subunit p40; | IL12B; | NP_001070881.1; | 329 | cat |
| O97687 | Interleukin-15; IL-15; | IL15; | NP_001009207.1; | 162 | cat |
| Q95M33 | Interleukin-18; IL-18; Interferon gamma-inducing factor; IFN-gamma-inducing factor; Interleukin-1 gamma; IL-1 gamma; | IL18; IGIF; | NP_001009213.2; | 192 | cat |
| O46613 | Interleukin-1 alpha; IL-1 alpha; | IL1A; | NP_001009351.1; | 270 | cat |
| P41687 | Interleukin-1 beta; IL-1 beta; | IL1B; | NP_001070882.1; | 267 | cat |
| P41690 | Interleukin-2 receptor subunit alpha; IL-2 receptor subunit alpha; IL-2-RA; IL-2R subunit alpha; IL2-RA; CD antigen CD25; | IL2RA; | NP_001009355.1; | 275 | cat |
| Q07885 | Interleukin-2; IL-2; T-cell growth factor; TCGF; | IL2; | NP_001036802.1; | 154 | cat |
| P55030 | Interleukin-4; IL-4; B-cell stimulatory factor 1; BSF-1; Lymphocyte stimulatory factor 1; | IL4; | NP_001036804.1; | 133 | cat |
| O77515 | Interleukin-5; IL-5; Eosinophil differentiation factor; T-cell replacing factor; TRF; | IL5; | NP_001009845.2; | 134 | cat |
| P41683 | Interleukin-6; IL-6; | IL6; | NP_001009211.1; | 208 | cat |
| Q9XSX5 | Interleukin-8; IL-8; C-X-C motif chemokine 8; Chemokine (C-X-C motif) ligand 8; | CXCL8; IL8; | NP_001009281.1; | 101 | cat |
| Q6X2S4 | Inhibin beta A chain; Activin beta-A chain; | INHBA; | NP_001009856.1; | 424 | cat |
| P06306 | Insulin; [Cleaved into: Insulin B chain; Insulin A chain]; | INS; | NP_001009272.1; | 110 | cat |
