| ABIN2 | Q8NFZ5 | | |
| ABIN-2 | Q8NFZ5 | | |
| ABL | P00519 | | |
| ABL1 | P00519 | | |
| ABP125 | O94979 | | |
| ABP130 | O94979 | | |
| ABP-280 | P21333-2 | | |
| ACF | Q9NQ94 | | |
| ACOT8 | O14734 | | |
| ACTB | P60709 | | |
| ACTEIII | O14734 | | |
| ACTG | P63261 | | |
| ACTG1 | P63261 | | |
| Actin-binding protein 280 | P21333-2 | | |
| Actin, cytoplasmic 1 | P60709 | | |
| Actin, cytoplasmic 2 | P63261 | | |
| Activating transcription factor 2 | P15336 | | |
| Activating transcription factor 3 | P18847-3 | | |
| Activating transcription factor 4 | P18848 | | |
| Activation B7-1 antigen | P33681 | | |
| Activation B7-2 antigen | P42081 | | |
| Activator protein 1 | P05412 | | |
| Activin receptor-like kinase 2 | Q04771 | | |
| Activin receptor-like kinase 3 | P36894 | | |
| Activin receptor-like kinase 6 | P36898 | | |
| Activin receptor type-1 | Q04771 | | |
| Activin receptor type-2A | P27037 | | |
| Activin receptor type-2B | Q13705 | | |
| Activin receptor type I | Q04771 | | |
| Activin receptor type IIA | P27037 | | |