
In vitro processing of miRNAs using nuclear extract. (A) In vitro-transcribed miRNAs, processed by 293T cell nuclear extract and visualized on a 10% urea-polyacrylamide gel. Bands corresponding to processed pre-miRNAs are marked in gray box, and areas containing pri-miRNAs used for normalization are labeled with black box. (B) 10/90-min ratios of quantified pre-miRNA levels normalized to each respective pri-miRNA levels as indicated in A.










