自发现某些内含子具有自我切割及连接的活性以来,具催化作用的核酸片段正引起人们巨大的关注。对此类分子的研究有可能为我们提供操纵生物大分子(如 DNA,RNA等)水平的非蛋白催化物质。此类核酸参与多种反应,不仅催化Ⅰ群内含子重组,参与基因校 Since the discovery of some introns with self-cleavage and ligation activity, a catalytic nucleic acid fragment is causing great concern. Research on such molecules has the potential to provide us with non-protein catalytic materials that manipulate the levels of biological macromolecules such as DNA, RNA, and the like. Such nucleic acid is involved in a variety of reactions, not only catalyzing group I intron recombination, involved in genetic school