端粒酶是一类特殊的核糖核蛋白酶，能够以自身的RNA为模板，通过自身的催化亚单位作用逆转录合成端粒，添加到染色体末端，维持染色体端粒末端结构的稳定性。
Telomerase is a special reverse transcriptase enzyme , which uses its own RNA component as a template to elongate the 3 ' - single-strand DNA extension of the chromosome terminus by the sythesis of telomeric repeats .
自身催化作用