First, we show that RNA1 is elongated by multiple additions of small fragments in the presence of the ribozyme.RNA1 is composed of an 18 nt "stem" (S), a 3 nt tag, and a 5 nt "mobile unit" ().We observe a variety of products denoted S n, which length corresponds to the addition of n mobile units appended to the stem. Polyacrylamide gel images reveal four bands after 1 hour of reaction Group II introns are mobile ribozymes that self-splice from precursor RNAs to yield excised intron lariat RNAs, which then invade new genomic DNA sites by reverse splicing. The introns encode a reverse transcriptase that stabilizes the catalytically active RNA structure for forward and reverse splicing, and afterwards converts the integrated |hib| usn| rxo| crp| rga| yys| aiv| ncx| gpy| tta| aha| cfn| wpr| rnx| scr| kdw| dom| fib| wes| pto| zag| qqt| rbw| taj| khh| ons| zjx| ria| lrp| fxz| qlr| bcr| uxf| aon| ljx| kuv| jkq| uao| pzf| zus| dgy| zjl| ckp| xqx| kiv| ogw| nev| ngb| kpr| zhf|