| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q95157 | Olfactory receptor-like protein OLF4; | NULL | NP_001013440.1; | 309 | dog |
| P30955 | Olfactory receptor-like protein DTMT; | NULL | NP_001014309.1;XP_005624413.1;XP_005624414.1; | 313 | dog |
| Q0ZFW8 | Oocyte-expressed protein; Oocyte- and embryo-specific protein 19; dOEP19; | OOEP; OEP19; | NP_001106928.1; | 149 | dog |
| P32308 | Rhodopsin; | RHO; | NP_001008277.1;XP_005632092.1; | 348 | dog |
| O18914 | Long-wave-sensitive opsin 1; Red cone photoreceptor pigment; Red-sensitive opsin; | OPN1LW; RCP; | NP_001184001.1; | 364 | dog |
| P83286 | Opticin; Oculoglycan; | OPTC; OPT; | NP_001003056.1; | 327 | dog |
| Q9GLF6 | Orexin; Hypocretin; Hcrt; [Cleaved into: Orexin-A (Hypocretin-1) (Hcrt1); Orexin-B (Hypocretin-2) (Hcrt2)]; | HCRT; OX PPOX; | NP_001029166.1;XP_005624415.1; | 130 | dog |
| Q05052 | Dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit; DDOST 48 kDa subunit; Oligosaccharyl transferase 48 kDa subunit; EC 2.4.99.18; | DDOST; OST48; | NP_001003321.1; | 445 | dog |
| P81455 | Osteocalcin; Bone Gla protein; BGP; Gamma-carboxyglutamic acid-containing protein; | BGLAP; | NULL | 49 | dog |
| P86218 | Oligosaccharyltransferase complex subunit OSTC; | OSTC; | NP_001153593.1;XP_005622639.1; | 149 | dog |
| Q9TUP7 | Orexin receptor type 2; Ox-2-R; Ox2-R; Ox2R; Hypocretin receptor type 2; | HCRTR2; | NP_001002933.1; | 444 | dog |
| Q29537 | Cellular tumor antigen p53; Tumor suppressor p53; | TP53; P53; | NP_001003210.1; | 381 | dog |
| P06596 | Phospholipase A2; EC 3.1.1.4; Group IB phospholipase A2; Phosphatidylcholine 2-acylhydrolase 1B; | PLA2G1B; | NP_001003320.1; | 146 | dog |
| Q28262 | Platelet-activating factor acetylhydrolase; PAF acetylhydrolase; EC 3.1.1.47; 1-alkyl-2-acetylglycerophosphocholine esterase; 2-acetyl-1-alkylglycerophosphocholine esterase; LDL-associated phospholipase A2; LDL-PLA(2); PAF 2-acylhydrolase; | PLA2G7; | NP_001003198.1; | 444 | dog |
| Q6XPZ3 | Group XV phospholipase A2; EC 2.3.1.-; 1-O-acylceramide synthase; ACS; LCAT-like lysophospholipase; LLPL; Lysophospholipase 3; Lysosomal phospholipase A2; LPLA2; | PLA2G15; LYPLA3; | NP_001002940.1; | 408 | dog |
| P01299 | Pancreatic prohormone; Pancreatic polypeptide; PP; [Cleaved into: Pancreatic hormone; Pancreatic icosapeptide]; | PPY; | XP_548067.2; | 93 | dog |
| P47240 | Paired box protein Pax-8; | PAX8; PAX-8; | NP_001003248.1; | 459 | dog |
| E2R222 | Pachytene checkpoint protein 2 homolog; Thyroid hormone receptor interactor 13; Thyroid receptor-interacting protein 13; TR-interacting protein 13; TRIP-13; | TRIP13; PCH2; | XP_851775.1; | 432 | dog |
| O77746 | cGMP-specific 3',5'-cyclic phosphodiesterase; EC 3.1.4.35; cGMP-binding cGMP-specific phosphodiesterase; CGB-PDE; | PDE5A; PDE5; | NP_001003188.1;XP_005639100.1; | 865 | dog |
| Q28263 | Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit alpha; GMP-PDE alpha; EC 3.1.4.35; | PDE6A; PDEA; | NP_001003073.1; | 861 | dog |
