- ARPC4
- ARPC4-TTLL3
- ARPC5
- ARPC5L
- ARPIN
- ARPM1
- ARPP19
- ARPP21
- ARR3
- ARRDC1
- ARRDC2
- ARRDC3
- ARRDC4
- ARRDC5
- Arrestin 3
- ARSF
- ARSG
- ARSJ
- ART1
- ART2.2/Art2b
- ART3
- ART4
- ART5
- ARTN
- ARV1
- ARVCF
- Arx
- Aryl Hydrocarbon Receptor
- Arylsulfatase A
- Arylsulfatase B
- Arylsulfatase D
- Arylsulfatase E
- Arylsulfatase H
- Arylsulfatase I
- Arylsulfatase K
- AS3MT
- ASA2B
- ASAH1
- ASAH2
- ASAP1
- ASAP2
- ASAP3
- ASB1
- ASB10
- ASB11
- ASB12
- ASB13
- ASB14
- ASB15
- ASB17
- ASB18
- ASB2
- ASB3
- ASB4
- ASB5
- ASB6
- ASB7
- ASB8
- ASB9
- ASCC1
- ASCC2
- ASCC3
- ASCL1
- ASCL2
- ASCL3
- ASCL4
- ASCL5
- ASF1A
- ASF1B
- ASH1L
- ASH2L
- Asialoglycoprotein Receptor 1
- Asialoglycoprotein Receptor 2
- ASIC1
- ASIC3
- ASIP
- ASK1
- ASL
- ASM
- ASMT
- ASMTL
- ASNA1
- ASNSD1
- ASPA
- Asparaginase
- Asparagine Synthetase
- Aspartate beta Hydroxylase
- Aspartyl Aminopeptidase
- ASPDH
- ASPHD1
- ASPHD2
- ASPM
- Asporin
- ASPRV1
- ASPSCR1
- ASRGL1
- ASS1
- ASTE1
- ASTL
- Astrotactin 2