emodin + S-adenosyl-L-methionine = physcion + S-adenosyl-L-homocysteine
emodin + s-adenosyl-l-methionine = physcion + s-adenosyl-l-homocysteine
emodin + S-adenosyl-L-methionine = physcion + S-adenosyl-L-homocysteine
emodin + s-adenosyl-l-methionine = physcion + s-adenosyl-l-homocysteine