irtually any method of RNA isolation that provides good quality RNA will suffice.
Isolate RNA by direct homogenization of fresh or frozen tissue in 10 volumes of 50 mM
sodium acetate buffer (pH 5.5)-2 mM EDTA-1% SDS, and 10 volumes of watersaturated
phenol in an Omni mixer at full speed for 1 min. Shake the mixture vigorously
for
10 min and centrifuge (all centrifugations are at 10,000 x g
for 10 min at 4C unless
otherwise
stated) to separate the phases. Re-extract the upper aqueous layer with an
equal
volume of water-saturated phenol as described above.