6 05 CH2—CH2—CH2—CH2-CH—COO nHS +nH3 Lysine In protein chemistry, we use Greek letter nomenclature. ----C-C-C-C-COOH Y阝a ·-C-C-C-C(NH2)-COOH a-Amino acid ----C-C-C (NH2)-C-CooH B-Amino Acid ----C-C (nH2) -C -C-COOH y-Amino Acid• ----C-C-C-C-COOH • γ β α • ----C-C-C-C(NH2 )-COOH α- Amino Acid • ----C-C-C (NH2 )- C - COOH β- Amino Acid • ----C-C (NH2 )- C - C - COOH γ- Amino Acid In protein chemistry, we use Greek letter nomenclature