RNaseA Inhibition
RNase levels in different RNA samples. RNaseA, water, RT buffer (used to dilute RNaseA), spleen RNA (S RNA-1 and S RNA-2), and pancreas RNA (P RNA-1 and P RNA-2) from two different preparations were assayed for RNaseA activity using a commercially available kit. RNaseA (several fold higher than normally found in contaminated RNA preparations) was used as control to demonstrate varying levels of RNaseA activity in sample preparations.
RNase inhibition by the iScript™ cDNA synthesis kit. RNaseA, water, RT buffer (used to dilute RNaseA), and RNase + iScript cDNA kit were assayed for RNaseA activity using a commercially available kit. RNaseA (several fold higher than normally found in contaminated RNA preparations) was used as control to assess the effect of inhibition by the iScript cDNA kit.
Functional RT-qPCR assay demonstrating RNaseA inhibition by the iScript cDNA synthesis kit. 18S rRNA was amplified using iQ™ SYBR® Green supermix. Reverse transcription (RT) performed with iScript kit (■); RT performed with spiked RNaseA (■); RT performed with RNaseA but no RNase inhibitor (■). Two RNA inputs (1,000 and 0.1 pg) were reverse transcribed for all three groups. The cDNA synthesis reaction with RNase but no RNase inhibitor showed significant threshold cycle (CT) delay (3–5), whereas the iScript kit demonstrated powerful inhibition of RNaseA. RFU, relative fluorescence units.