(2R)-2-hydroxy-4-(methylsulfanyl)butanoate + S-adenosyl-L-methionine = (2R)-4-(dimethylsulfaniumyl)-2-hydroxybutanoate + S-adenosyl-L-homocysteine
(2r)-2-hydroxy-4-(methylsulfanyl)butanoate + s-adenosyl-l-methionine = (2r)-4-(dimethylsulfaniumyl)-2-hydroxybutanoate + s-adenosyl-l-homocysteine
(2R)-2-hydroxy-4-(methylsulfanyl)butanoate + S-adenosyl-L-methionine = (2R)-4-(dimethylsulfaniumyl)-2-hydroxybutanoate + S-adenosyl-L-homocysteine
(2r)-2-hydroxy-4-(methylsulfanyl)butanoate + s-adenosyl-l-methionine = (2r)-4-(dimethylsulfaniumyl)-2-hydroxybutanoate + s-adenosyl-l-homocysteine