N-methyltransferase
N-methyltransferase may refer to:
- (RS)-1-benzyl-1,2,3,4-tetrahydroisoquinoline N-methyltransferase
 - 3-hydroxy-16-methoxy-2,3-dihydrotabersonine N-methyltransferase
 - Amine N-methyltransferase
 - Anthranilate N-methyltransferase
 - (cytochrome c)-arginine N-methyltransferase
 - (Myelin basic protein)-arginine N-methyltransferase
 - Calmodulin-lysine N-methyltransferase
 - Carnosine N-methyltransferase
 - (S)-coclaurine-N-methyltransferase
 - Dimethylhistidine N-methyltransferase
 - Glycine N-methyltransferase
 - Guanidinoacetate N-methyltransferase
 - Histamine N-methyltransferase
 - Histone methyltransferase
 - (cytochrome c)-lysine N-methyltransferase
 - (Ribulose-bisphosphate carboxylase)-lysine N-methyltransferase
 - Methylamine—glutamate N-methyltransferase
 - Nicotinamide N-methyltransferase
 - Nicotinate N-methyltransferase
 - Phenylethanolamine N-methyltransferase
 - Phosphatidylethanolamine N-methyltransferase
 - Phosphatidyl-N-methylethanolamine N-methyltransferase
 - Phosphoethanolamine N-methyltransferase
 - Protein-histidine N-methyltransferase
 - Putrescine N-methyltransferase
 - Pyridine N-methyltransferase
 - (S)-tetrahydroprotoberberine N-methyltransferase
 - Trimethylsulfonium—tetrahydrofolate N-methyltransferase
 - Tyramine N-methyltransferase