
IP RP μHPLC chromatogram of the enriched small RNAs from total RNA spiked with synthetic let-7 miRNA. The chromatogram shows the analysis of the small RNA fraction obtained following the solid phase enrichment of a total RNA (20 μg) spiked with synthetic miRNA (let-7 150 ng) using gradient 5 (see Materials and Methods). The let-7 miRNA species is highlighted.










