Structures of Amino Acids Isoleucine 131 2.36 9.60 6.02 0 0 Leucine Leu 131 HgC 2.36 9.60 一 5.98 Methionine Met M 149 2.28 9.21 一 5.74 H3C Phenylalanine Phe 165 1.83 9.13 一 5.48 Proline Pro 115 1.99 10.60 6.30 Cengage Learning.All Rights Reserved.Structures of Amino Acids