In vitro selection of the Naegleria GIR1 ribozyme identifies three base changes that dramatically improve activity.


NanGIR1 is a member of a new class of group I ribozymes whose putative biological function is site-specific hydrolysis at an internal processing site (IPS). We have previously shown that NanGIR1 requires 1 M KCl for maximal activity, which is nevertheless slow (0.03 min(-1)). We used in vitro selection and an RNA pool with approximately nine mutations per… (More)


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