遗传密码的信息内涵及其与氨基酸的对应联系  

Information Connotation of Genetic Codes and Their Corresponding Relationship with Amino Acids

作　　者：许晓风[1] 汪四水[2] 金詟[1] 胡艳[1] 

机构地区：[1]南京师范大学生命科学学院,南京210097 [2]苏州大学数学科学学院,苏州215021

出　　处：《南京师大学报（自然科学版）》2001年第2期63-66,共4页Journal of Nanjing Normal University(Natural Science Edition)

摘　　要：为了探讨遗传密码的起源 ,本文系统考察了四种核苷酸和各类密码子的编码信息、密码子与氨基酸的对应分类关系 ,发现 :①四种核苷酸的编码能力依次为A >U >G >C ;②嘌呤型 (PP)、嘧啶型 (MM)与嘌嘧混合型 (PM)密码子的编码能力表现为PP >MM >PM ;③氨基酸与碱基型密码子的对应分类关系较为确定 ,其中PP有酸性、碱性及酰氨型氨基酸 ,MM有芳香族、杂环族氨基酸 ;PM有脂肪族氨基酸编码的偏爱性 .认为遗传密码与氨基酸对应联系的起源不是随机发生的 .A systematic survey on coding capacity of genetic codons and their corresponding relationship with protein amino acids was carried out in this paper so as to explore the origination of genetic codes. The obtained results were as follows:①the coding capacity of nucleotides A, G, C, T being different with the order as A>U>G>C; ②that of three kinds of codons e.g. purine type (PP), pyrimidine type (MM) and purine-pyrimidine mixed type (PM) also being various with the order as PP>MM>PM;③amino acids (AA) having a comparatively definite corresponding relationship with PP, MM, PM codons, among which acid, basic and amide AAs are related with PP codons, aromatic and imino AAs with MM codons while aliphatic AAs with PM codons. It is believed that the origination of genetic codes is not a random event.

关 键 词：遗传密码 编码信息 氨基酸 对应联系 

分 类 号：Q755[生物学—分子生物学]