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籼稻基因组中的tRNA研究 被引量:1

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摘要 在籼稻基因组的127551个重叠群中,共发现了596个tRNA基因,其中有3个携带硒代半胱氨酸的tRNA基因和一个抑制型tRNA基因.除了上述4个特殊的tRNA基因外,592个tRNA可按密码子分成45种,Guthrie等人提出的修正摆动假设完全成立.在这些重叠群中,还发现了27个假基因,但未发现trnT-CGU基因,这可能是由于现有序列数据的不完备.在上述592个tRNA基因中,可能存在冗余,而且还可能再有新发现.研究了水稻基因中密码子的使用与tRNA基因的数目之间的关系.从水稻的两个栽培亚种——籼稻和粳稻的叶绿体基因组中,各发现了33个tRNA基因,经多重联配发现,两组tRNA基因完全相同.
出处 《中国科学(C辑)》 CSCD 北大核心 2002年第6期505-511,共7页 Science in China(Series C)
基金 国家重点基础研究发展规划(批准号:G2000077300) 北京市248创新计划资助项目
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