RT was then performed in a total volume of 20 μl,
which comprised 10 μl sample RNA, 4 μl 5× reverse
transcriptase buffer (Invitrogen), 8 U RNAseout, 150 U
Superscript III reverse transcriptase, 0.036 U random
primers (Invitrogen), 10 mM dithiothreitole, 0.5 mM each
dNTP.