一)氨基酸的分类·不同氨基酸其R各异（熟记口决）老歪阿金酪YR精天D谷E天地古衣K赖苯色FW看来本色富丽姑嫌厚冬嫌淡谷酰Q，冬酰N分 类:非极性疏水性氨基酸：极性中性氨基酸酸性侧链氨基酸：碱性侧链氨基酸：
• 不同氨基酸其R各异(熟记口诀） 老歪阿金 酪Y R精 天地古衣 天D 谷E 看来本色富丽 K赖苯色FW 姑嫌厚冬嫌淡 谷酰Q,冬酰N • 分 类: ① 非极性疏水性氨基酸： ② 极性中性氨基酸： ③ 酸性侧链氨基酸： ④ 碱性侧链氨基酸： (一) 氨基酸的分类
氨基酸的名称与符号丙氨酸AlaalanineARNDCQE精氨酸Argarginine天冬酰氨AsnAsxasparagine天冬氨酸asparticacidAspAsx半胱氨酸Cyscystine谷氨酰胺Gln Glxglutarmine谷氨酸Glu Glxglutarmic acidG甘氨酸GlyglycineH组氨酸HishistidineILIle异亮氨酸isoleucine亮氨酸LeuleucineK赖氨酸lysineLysM甲硫氨酸MetmethionineE苯丙氨酸Phephenylalanine一P脯氨酸ProprolineS丝氨酸SerserineT苏氨酸ThrthreonineW色氨酸TrptryptophanY酪氨酸TyrtyrosineV缬氨酸Valyaline
alanine 丙氨酸 Ala A arginine 精氨酸 Arg R asparagine 天冬酰氨 Asn Asx N aspartic acid 天冬氨酸 Asp Asx D cystine 半胱氨酸 Cys C glutarmine 谷氨酰胺 Gln Glx Q glutarmic acid 谷氨酸 Glu Glx E glycine 甘氨酸 Gly G histidine 组氨酸 His H isoleucine 异亮氨酸 Ile I leucine 亮氨酸 Leu L lysine 赖氨酸 Lys K methionine 甲硫氨酸 Met M phenylalanine 苯丙氨酸 Phe F proline 脯氨酸 Pro P serine 丝氨酸 Ser S threonine 苏氨酸 Thr T tryptophan 色氨酸 Trp W tyrosine 酪氨酸 Tyr Y valine 缬氨酸 Val V 氨基酸的名称与符号
Figure5-6Nonpolar (hydrophobic)RgroupsThe 20 omino acids common in proteins.They are shown with their amino ond carboxyl groups ionized,as theywould occurCOOGOOCOOat pH 7.o.The shaded portions are thoseHNAHNHcommon to all the amino acids.The un.shaded portions are theirRgroups.CH,CHcasH-C-CHH,CCH,CHcnHCCH,AlanineValineLoucineIsoleucinCOOCO0COOHHN-HHN-HN-H.NCHCHCH,CHHCCHCHC-CHNHCH,ProlineMethioninePhenylalanineTryptophanPolar but uncharged R groupsB0OOO000OHN.HHANHNHNHNH.NHHCH,OHH--OHCHOH.CH.CHaCH,SHCHH.NH.N9OHGlycineSerineThreonineCysteineTyrosineAsparagineGlutamineNegatively charged RgroupsPositively charged RgroupsO0CDO000OOHN-C-HHNBNHN-OHNCHCH,CH,CH1COOcHCltCHNHCOoCH,CHHCHNHNH,CNHNHAsparticGlutamicLysineArginineHistidineacidacid
半胱氨酸Cysteine和胱氨酸CystineCOOHCOOH-C--HCHHNH,NHSSHCH2-CH2CvsteineCysteine2H2HCOOHCOOHHC-HH,NCH,NSS.CH2CH2Cystine
半胱氨酸Cysteine和胱氨酸Cystine
Amino acids with electrically chargedside chainsPositiveNegativeArginineHistidineLysineAsparticacidGlutamicacidAmino acids with polarbut uncharged side chainsSerineThreonineGlutamineAsparagineSpecialcasesGlycineProlineCysteineAmino acids withhydrophobic side chainsAlanineIsoleucineTryptophanPhenylalanineMethionineValineLeucineTyrosine