ok, I will try my best to answer your question,first if you want to find the differential expression genes between two cell lines,there is not gene-expression database,but there are a lot of papers about that,you can collect them. many good reviews are really helpful to you.1 `. u: K$ N+ q
Substractive Hybridization -> adapter ligation -> PCR amplification -> cloning and sequencing(I'm doing this, because sperm RNA cannot using microarray to analysis)# b6 g- l7 x) Y) `1 K! c( {
You can also utilize Gene Expression Microarrays to do Expression profiling.