【摘要】 自1977年发现不连续基因（断裂基因）以来，有关内元（内含子）的功用以及转录后的加工机制是真核生物分子遗传研究的一个热门。本文就有关内元的类型、剪接机制及在基因表达中的调控作进一步的探讨。更多还原

【Abstract】 Since the split gene was found in 1977,the processing mechanism transcribed andthe function of intron have been a popular subject about the study of molecular genetics ineucaryote. This paper has discussed the intron types, the splicing mechanism, the function of geneexpression’s regulation.更多还原