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遗传密码子进化的阶段性 被引量:6
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作者 肖敬平 《生命科学研究》 CAS CSCD 2002年第3期198-203,共6页
密码子的起源与进化可划分为 4个阶段 ,即 :前密码子期 ,tRNA形成期 ,原密码子与有序肽同步起源期 ,以及密码子进化期 .不同的观点 ,大都能在不同时期找到自己的位置 ,从而是互补的 .在此基础上 ,首次将主要理论的主旨整合为一个进化过... 密码子的起源与进化可划分为 4个阶段 ,即 :前密码子期 ,tRNA形成期 ,原密码子与有序肽同步起源期 ,以及密码子进化期 .不同的观点 ,大都能在不同时期找到自己的位置 ,从而是互补的 .在此基础上 ,首次将主要理论的主旨整合为一个进化过程的理论框架 ,基本上协调了持续了近半个世纪的确定论和偶然论之争 。 展开更多
关键词 遗传密码子 进化 阶段性 密码子起源 TRNA 氨酰-TRNA合成酶
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Complete mitochondrial genome of yellow meal worm (Tenebrio molitor) 被引量:4
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作者 Li-Na LIU Cheng-Ye WANG 《Zoological Research》 CAS CSCD 北大核心 2014年第6期537-545,共9页
The yellow meal worm (Tenebrio molitor L.) is an important resource insect typically used as animal feed additive. It is also widely used for biological research. The first complete mitochondrial genome of T. rnolit... The yellow meal worm (Tenebrio molitor L.) is an important resource insect typically used as animal feed additive. It is also widely used for biological research. The first complete mitochondrial genome of T. rnolitor was determined for the first time by long PCR and conserved primer walking approaches. The results showed that the entire mitogenome of T. molitor was 15 785 bp long, with 72.35% A+T content [deposited in GenBank with accession number KF418153]. The gene order and orientation were the same as the most common type suggested as ancestral for insects. Two protein-coding genes used atypical start codons (CTA in ND2 and AAT in COX1), and the remaining 11 protein-coding genes started with a typical insect initiation codon ATN. All tRNAs showed standard clover-leaf structure, except for tRNASer (AGN), which lacked a dihydrouridine (DHU) arm. The newly added T. molitor mitogenome could provide information for future studies on yellow meal worm. 展开更多
关键词 TENEBRIONIDAE MITOGENOME EVOLUTION Resource insect Yellow meal worm
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