摘要
对６７个内含子的二级结构进行分析后，我们发现内含子两末端的碱基Ｇ绝大多数是游离的，剪接过程中形成“马套”结构的分枝点Ａ有８０％以上位于环区或游离的单链区，内含子５’端的Ｇ与分枝点Ａ在空间位置上彼此靠近。
After analyzing the secondary structures of 67 introns, we found that most of the 5'and 3' terminal bases G of introns are free, and over 80% of the branch points A of 'lariat' structures formed in splicing process are situated in loops or isngle-stranded free regions. We also found that 5' terminal G and branch point A of each intron approach each other in space.
出处
《生物物理学报》
CAS
CSCD
北大核心
1996年第3期477-481,共5页
Acta Biophysica Sinica
关键词
内含子
二级结构
剪接位点
Intron
Secondary Structure
'Lariat'Strucure
Branch point
