L-tryptophan + S-adenosyl-L-methionine = 2-methyl-L-tryptophan + S-adenosyl-L-homocysteine + H(+)
l-tryptophan + s-adenosyl-l-methionine = 2-methyl-l-tryptophan + s-adenosyl-l-homocysteine + h(+)
"tryptophan 2-C-methyltransferase"
"tryptophan 2-c-methyltransferase"