precorrin-1 + S-adenosyl-L-methionine <=> precorrin-2 + S-adenosyl-L-homocysteine
precorrin-1 + s-adenosyl-l-methionine <=> precorrin-2 + s-adenosyl-l-homocysteine
precorrin-1 + S-adenosyl-L-methionine <=> precorrin-2 + S-adenosyl-L-homocysteine
precorrin-1 + s-adenosyl-l-methionine <=> precorrin-2 + s-adenosyl-l-homocysteine