(2)根据R基团极性的不同分美 ①非极性或疏水性氨基酸Ala Leu Ile Val Pro Trp Phe Met ②侧链不带电荷的极性氨基酸Ser Thr Tyr Cys Asp GIn Gly ③在pH6~7中带负电荷Asp Glu ④ 在pH6~7中带正电荷Lys Arg His www.themegallery.com LGOwww.themegallery.com LOGO （2）根据R基团极性的不同分类 ① 非极性或疏水性氨基酸Ala Leu Ile Val Pro Trp Phe Met ② 侧链不带电荷的极性氨基酸 Ser Thr Tyr Cys Asp Gln Gly ③ 在pH6～7中带负电荷Asp Glu ④ 在pH6～7中带正电荷 Lys Arg His