Isolation of total RNA from animal tissues and cells - by GuSCN and silico (May/30/2001 )

I would be deeply appreciated if anyone can advice me a protocol to isolate total RNA from animal tissues and cells using guanidine thiocyanate and silica. We now use our own home-brew silica-based DNA isolation system for all the DNA work..

Please take a look at the kits sold by all major companies.