| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q08DS3 | Protein odd-skipped-related 1; | OSR1; ODD1; | NP_001070384.2; | 267 | cow |
| Q3T135 | Protein odd-skipped-related 2; | OSR2; | NP_001029500.1; | 276 | cow |
| A6QPY0 | Dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit; DDOST 48 kDa subunit; Oligosaccharyl transferase 48 kDa subunit; EC 2.4.99.18; | DDOST; | NP_001094543.1; | 439 | cow |
| Q3T124 | Organic solute transporter subunit alpha; OST-alpha; Solute carrier family 51 subunit alpha; | SLC51A; OSTA; | NP_001020504.1;XP_005201455.1; | 340 | cow |
| A0JNM1 | Organic solute transporter subunit beta; OST-beta; Solute carrier family 51 subunit beta; | SLC51B; OSTB; | NP_001071335.1;XP_005211336.1;XP_005211337.1; | 130 | cow |
| P02820 | Osteocalcin; Bone Gla protein; BGP; Gamma-carboxyglutamic acid-containing protein; | BGLAP; | NP_776674.1; | 100 | cow |
| Q2KID7 | Oligosaccharyltransferase complex subunit OSTC; | OSTC; | NP_001070560.1; | 149 | cow |
| Q8MJ50 | Osteoclast-stimulating factor 1; | OSTF1; | NP_776834.1; | 214 | cow |
| P31098 | Osteopontin-K; | NULL | NULL | 277 | cow |
| P31096 | Osteopontin; Bone sialoprotein 1; Secreted phosphoprotein 1; SPP-1; | SPP1; OPN; | NP_776612.1;XP_005207799.1; | 278 | cow |
| Q9N1U7 | Ornithine carbamoyltransferase, mitochondrial; EC 2.1.3.3; Ornithine transcarbamylase; OTCase; | OTC; | NP_803453.1; | 354 | cow |
| Q05B57 | Ubiquitin thioesterase OTU1; EC 3.4.19.12; | YOD1; | NP_001073778.1; | 348 | cow |
| Q3SZ07 | Ovarian cancer-associated gene 2 protein homolog; | OVCA2; | NP_001029773.1; | 227 | cow |
| Q28042 | Oviduct-specific glycoprotein; Estrogen-dependent oviduct protein; Oviductal glycoprotein; Oviductin; Fragment; | OVGP1; OGP; | NULL | 537 | cow |
| A2VDT4 | Putative transcription factor Ovo-like 1; | OVOL1; | NP_001074990.1;XP_005227127.1; | 267 | cow |
| Q0GBZ5 | Orexin receptor type 1; Ox-1-R; Ox1-R; Ox1R; Hypocretin receptor type 1; | HCRTR1; | NP_001041647.1;XP_005202949.1;XP_005202950.1; | 425 | cow |
| P83862 | Orexigenic neuropeptide QRFP; [Cleaved into: QRF-amide (Neuropeptide RF-amide) (Pyroglutamylated arginine-phenylalanine-amide peptide)]; | QRFP; | NP_937865.1; | 134 | cow |
| Q3SYV3 | Mitochondrial inner membrane protein OXA1L; Oxidase assembly 1-like protein; OXA1-like protein; | OXA1L; | NP_001030412.1; | 441 | cow |
| P31228 | D-aspartate oxidase; DASOX; DDO; EC 1.4.3.1; | DDO; | NP_776333.1; | 341 | cow |
| A7YVI8 | Oxidoreductase-like domain-containing protein 1; | OXLD1; | NP_001099105.1; | 153 | cow |
