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. 5 z ], ~! L# \) W6 C( S
Substractive Hybridization -> adapter ligation -> PCR amplification -> cloning and sequencing(I'm doing this, because sperm RNA cannot using microarray to analysis) 7 w+ n$ n' |$ |% k# zYou can also utilize Gene Expression Microarrays to do Expression profiling.