EOG8Z655H GO:0008757 4/8 S-adenosylmethionine-dependent methyltransferase activity molecular_function "Catalysis of the transfer of a methyl group from S-adenosyl-L-methionine to a substrate." [GOC:mah] EOG8Z655H GO:0008119 4/8 thiopurine S-methyltransferase activity molecular_function "Catalysis of the reaction: S-adenosyl-L-methionine + a thiopurine = S-adenosyl-L-homocysteine + a thiopurine S-methylether." [EC:2.1.1.67]