Olivier De Backer wrote: > > I'm searching for an homology between two sequences but if it exists > it's very weak. So I tried all gcg stuffs without convincing results. Is > there still any hope? If you know another powerfull software to find > poor homology please tell me. Thanks a lot Have you tried PSI-BLAST? http://www.ncbi.nlm.nih.gov/blast/psiblast.cgi