| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| A5PJP6 | Lys-63-specific deubiquitinase BRCC36; EC 3.4.19.-; BRCA1-A complex subunit BRCC36; BRCA1/BRCA2-containing complex subunit 3; BRCA1/BRCA2-containing complex subunit 36; BRISC complex subunit BRCC36; | BRCC3; BRCC36; | NP_001069258.1;XP_005227704.1;XP_005227706.1; | 316 | cow |
| Q32S26 | Bromodomain-containing protein 2; | BRD2; | NP_001039331.1;XP_005223266.1;XP_005223267.1;XP_005223268.1;XP_005223269.1; | 803 | cow |
| A2VDP1 | E3 ubiquitin-protein ligase BRE1A; BRE1-A; EC 6.3.2.-; RING finger protein 20; | RNF20; BRE1A; | NP_001075056.1;XP_005210543.1;XP_005210544.1; | 975 | cow |
| A6QQW8 | BRCA1-A complex subunit BRE; BRCA1/BRCA2-containing complex subunit 45; Brain and reproductive organ-expressed protein; | BRE; | NP_001095744.1;XP_005213107.1;XP_005213108.1; | 383 | cow |
| Q29S07 | Transcription factor IIIB 50 kDa subunit; B-related factor 2; BRF-2; | BRF2; | NP_001015582.1; | 421 | cow |
| Q32L83 | Brain protein I3; | BRI3; | NP_001035673.1; | 124 | cow |
| A4FV29 | Breast cancer metastasis-suppressor 1-like protein; | BRMS1L; | NP_001076897.1; | 323 | cow |
| Q1LZE0 | Breast cancer metastasis-suppressor 1 homolog; | BRMS1; | NP_001069872.1; | 246 | cow |
| Q5E9L2 | BMP/retinoic acid-inducible neural-specific protein 1; Deleted in bladder cancer protein 1 homolog; | BRINP1; DBC1 FAM5A; | NP_001015669.1; | 761 | cow |
| Q3SZZ0 | Ribosome biogenesis protein BRX1 homolog; Brix domain-containing protein 2; | BRIX1; BRIX BXDC2; | NP_001029701.1; | 353 | cow |
| Q5E9P6 | Seipin; Bernardinelli-Seip congenital lipodystrophy type 2 protein homolog; | BSCL2; | NP_001015589.1; | 394 | cow |
| Q3SX22 | BSD domain-containing protein 1; | BSDC1; | NP_001030198.1;NP_001240651.1; | 461 | cow |
| P18892 | Butyrophilin subfamily 1 member A1; BT; | BTN1A1; BTN; | NP_776933.1; | 526 | cow |
| Q2KIY7 | Transcription factor BTF3 homolog 4; Basic transcription factor 3-like 4; | BTF3L4; | NP_001091575.1;XP_005204657.1; | 158 | cow |
| A4IFG2 | BTB/POZ domain-containing protein 9; | BTBD9; | NP_001121970.1; | 611 | cow |
| Q32L18 | BTB/POZ domain-containing protein 16; | BTBD16; | NP_001033220.1; | 499 | cow |
| A6QPA3 | BTB/POZ domain-containing protein 19; | BTBD19; | NP_001094711.1; | 291 | cow |
| Q9TTC5 | Probetacellulin; [Cleaved into: Betacellulin (BTC)]; | BTC; | NULL | 178 | cow |
| A6QQ07 | Biotinidase; Biotinase; EC 3.5.1.12; | BTD; | NP_001095676.1; | 525 | cow |
| P53348 | Protein BTG1; B-cell translocation gene 1 protein; Myocardial vascular inhibition factor; VIF; | BTG1; | NP_776424.1; | 171 | cow |
