carnosine + S-adenosyl-L-methionine <=> anserine + S-adenosyl-L-homocysteine + H(+)
carnosine + s-adenosyl-l-methionine <=> anserine + s-adenosyl-l-homocysteine + h(+)
carnosine + S-adenosyl-L-methionine <=> anserine + S-adenosyl-L-homocysteine + H(+)
carnosine + s-adenosyl-l-methionine <=> anserine + s-adenosyl-l-homocysteine + h(+)