2.1.1.59 puromycin - 2.1.1.59 S-Adenosyl-D-homocysteine - 2.1.1.59 S-adenosyl-L-homocysteine competitive versus S-adenosyl-L-methionine 2.1.1.59 S-adenosyl-L-homocysteine - 2.1.1.59 S-adenosyl-L-methionine -