dopamine + S-adenosyl-L-methionine <=> N-methyl-dopamine + S-adenosyl-L-homocysteine + H(+)
dopamine + s-adenosyl-l-methionine <=> n-methyl-dopamine + s-adenosyl-l-homocysteine + h(+)
dopamine + S-adenosyl-L-methionine <=> N-methyl-dopamine + S-adenosyl-L-homocysteine + H(+)
dopamine + s-adenosyl-l-methionine <=> n-methyl-dopamine + s-adenosyl-l-homocysteine + h(+)