- BTBD18
- BTBD19
- BTBD2
- BTBD3
- BTBD6
- BTBD7
- BTBD8
- BTBD9
- BTD
- BTF3
- BTF3L4
- BTF3P11
- BTF3P13
- BTG1
- BTG2
- BTG3
- BTG4
- BTK
- BTLA
- BTN1A1
- BTN2A1
- BTN2A2
- BTN2A3P
- BTN3A1
- BTN3A2
- BTN3A3
- Btnl1
- BTNL10
- BTNL2
- BTNL3
- BTNL8
- BTNL9
- BTRC
- BUB1
- BUB1B
- BUB3
- Bublin Coiled Coil Protein
- BUD13
- BUD31
- BUG1
- Butyrophilin
- Butyrylcholinesterase
- BVES
- Bystin-Like
- BZRAP1
- BZW1
- BZW2