按R的极性分类 非极性氨基酸：Ala,Ile,Leu,Phe,Met,Trp,Val,Pro 极性氨基酸 无电荷侧链氨基酸:Ser,Thr,Tyr,Asn,Gln,Cys,Gly 带正电荷侧链氨基酸:Lys,Arg,His 带负电荷侧链氨基酸:Asp,Glu 2、分类按R的极性分类 非极性氨基酸：Ala,Ile,Leu,Phe,Met,Trp,Val,Pro 极性氨基酸 无电荷侧链氨基酸:Ser,Thr,Tyr,Asn,Gln,Cys,Gly 带正电荷侧链氨基酸:Lys,Arg,His 带负电荷侧链氨基酸:Asp,Glu 2、分类