Total mRNA was extracted from the frozen heart tissue using the RNeasy fibrous tissue Kit from QIAGEN (Chatsworth, CA). Contaminating DNA was removed by deoxyribonuclease I digestion of the RNA preparation when still bound to the column. An average of 27ug of total RNA was obtained from 20mg of frozen mouse heart tissue.
Label
biotin
Label protocol
Approximately 5 µg of total RNA was processed to produce biotinylated cRNA targets.