Hi Andrew: I assume he wants to build clusters (from your description)? . On the Phylogeny side, I would suggest looking at PAUP: http://paup.csit.fsu.edu/about.html Phylip: http://evolution.genetics.washington.edu/phylip.html and others. If you want the big list of phylogeny programs, have a look at http://evolution.genetics.washington.edu/phylip/software.html Joe On Wed, 2003-04-09 at 16:09, Andrew Shewmaker wrote: > Hello, > > I'm a linux cluster admin and I'm trying to help a biologist find the right > software for his needs. He is currently using clustalw to process multiple > alignments (~ 400 sequences), and he needs a good phylogenic tool. He isn't -- Joseph Landman, Ph.D Scalable Informatics LLC, email: landman@scalableinformatics.com web : http://scalableinformatics.com phone: +1 734 612 4615