- M
- MIR03
- MIR15
- MIR16
- MIR19
- MIR29
- MIR33
- MIR34
- MIR92
- MIR103
- MIR143
- MIR182
- MIR191
- MIR199
- MIR208
- MIR217
- MIR296
- MIR326
- MIR378
- MIR423
- MIR451
- MIR638
- MIR1291
- MIR3151
- Melatonin receptor
- MS4A2
- MOGAT2
- MSH
- MALT1
- MDM2
- MDM4
- MYLIP
- MAO
- MIR10B
- MIR17
- MCHR
- MIR18A
- MCHR1
- MIR21
- MIR27A
- MIR29A
- MCR
- MIR29B
- MC1R
- MIR31
- MC2R
- MC3R
- MC4R
- MIR34A
- MC5R
- MIR99A
- MIR100
- MIR122
- MIR125A
- MIR126
- MIR132
- MIR133
- MIR145
- MIR146
- MIR155
- MAN2B1
- MIR192
- MANA
- MUTYH
- MIR205
- MIR206
- MIR210
- MRC
- MIR214
- MIR221
- MIR222
- MIR328
- MTHFD1L
- MurD
- MFN
- MIR466
- MIR485
- MIR574
- Mannosyltransferase
- MenA
- MIR710
- Methyltransferase
- MIRLET7
- MIRLET7A
- MARS
- MIRLET7A1
- MIRLET7C
- MTNR
- MT1
- MT2
- MT3
- MTNR1B
- MPO
- MGEA5
- MTAN
- Major pollen allergen
- Mite allergen
- MGMT
- MTR
- MAT2A
- MOR