One of these splicing signals sits at the beginning of the intron and is called the 5' (five-prime) splice site; the others, located at the end of the intron, are known as the branch site, the polypyrimidine tract and, finally, the 3' (three-prime) splice
One of these splicing signals sits at the beginning of the intron and is called the 5' (five-prime) splice site; the others, located at the end of the intron, are known as the branch site, the polypyrimidine tract and, finally, the 3' (three-prime) splice
其中一段位在插入子的起头，有一个剪接信号序列，标明5'端剪接位；插入子的尾端有其他的信号：分支点、多嘧啶区，最后则是3'端剪接位。