| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P23196 | DNA-(apurinic or apyrimidinic site) lyase; EC 3.1.-.-; EC 4.2.99.18; APEX nuclease; APEN; Apurinic-apyrimidinic endonuclease 1; AP endonuclease 1; REF-1; Redox factor-1; [Cleaved into: DNA-(apurinic or apyrimidinic site) lyase, mitochondrial]; | APEX1; APE APEX BAP1 REF1; | NP_788782.2; | 318 | cow |
| Q5E9N9 | DNA-(apurinic or apyrimidinic site) lyase 2; EC 3.1.-.-; EC 4.2.99.18; APEX nuclease 2; Apurinic-apyrimidinic endonuclease 2; AP endonuclease 2; | APEX2; | NP_001015577.1; | 514 | cow |
| A0JNH9 | Aprataxin and PNK-like factor; EC 4.2.99.18; Apurinic-apyrimidinic endonuclease APLF; | APLF; | NP_001071342.1; | 485 | cow |
| Q3T0E5 | Adipocyte plasma membrane-associated protein; | APMAP; | NP_001030490.1; | 412 | cow |
| P15497 | Apolipoprotein A-I; Apo-AI; ApoA-I; Apolipoprotein A1; [Cleaved into: Proapolipoprotein A-I (ProapoA-I); Truncated apolipoprotein A-I]; | APOA1; | NP_776667.2; | 265 | cow |
| P81644 | Apolipoprotein A-II; Apo-AII; ApoA-II; Antimicrobial peptide BAMP-1; Apolipoprotein A2; [Cleaved into: Proapolipoprotein A-II (ProapoA-II); Truncated apolipoprotein A-II (Apolipoprotein A-II(1-76))]; | APOA2; | NP_001039381.1; | 100 | cow |
| Q32PJ2 | Apolipoprotein A-IV; Apo-AIV; ApoA-IV; Apolipoprotein A4; | APOA4; | NP_001032557.1; | 380 | cow |
| P19034 | Apolipoprotein C-II; Apo-CII; ApoC-II; Apolipoprotein C2; [Cleaved into: Proapolipoprotein C-II (ProapoC-II)]; | APOC2; | NP_001095850.1; | 101 | cow |
| P19035 | Apolipoprotein C-III; Apo-CIII; ApoC-III; Apolipoprotein C3; | APOC3; | NP_001001175.1; | 96 | cow |
| Q3SYR5 | Apolipoprotein C-IV; Apo-CIV; ApoC-IV; Apolipoprotein C4; | APOC4; | NP_001029979.1; | 127 | cow |
| Q32KY0 | Apolipoprotein D; Apo-D; ApoD; | APOD; | NP_001069769.1; | 189 | cow |
| Q03247 | Apolipoprotein E; Apo-E; | APOE; | NP_776416.1;XP_005219206.1;XP_005219207.1; | 316 | cow |
| P17690 | Beta-2-glycoprotein 1; Apolipoprotein H; Apo-H; Beta-2-glycoprotein I; B2GPI; Beta(2)GPI; | APOH; | NP_776417.1; | 345 | cow |
| Q148H0 | Apolipoprotein O; Protein FAM121B; | APOO; FAM121B; | NP_001069107.1; | 198 | cow |
| Q148E1 | Apoptogenic protein 1, mitochondrial; APOP-1; | APOPT1; APOP1; | NP_001069927.1; | 192 | cow |
| F7VJQ2 | Alternative prion protein; AltPrP; | NULL | NP_001258554.1; | 81 | cow |
| Q7YRZ2 | Aprataxin; EC 3.-.-.-; Forkhead-associated domain histidine triad-like protein; FHA-HIT; | APTX; | NP_872595.1; | 356 | cow |
| Q56JW4 | Adenine phosphoribosyltransferase; APRT; EC 2.4.2.7; | APRT; | NP_001020505.1; | 180 | cow |
| P47865 | Aquaporin-1; AQP-1; Aquaporin-CHIP; Water channel protein CHIP29; Water channel protein for red blood cells and kidney proximal tubule; | AQP1; | NP_777127.1; | 271 | cow |
| P79099 | Aquaporin-2; AQP-2; ADH water channel; Aquaporin-CD; AQP-CD; Collecting duct water channel protein; WCH-CD; Water channel protein for renal collecting duct; | AQP2; | NP_001094669.1; | 271 | cow |
