Hello Netters, I would be pleased if anybody can tell me where to find a UNIX or DOS program to calculate rates or numbers of synonymous / nonsynonymous substitutions. A FTP site would be ideal. Thanks. (E-mail m.o.ortells at bath.ac.uk) M.O.Ortells, Bath, UK. -- Marcelo O. Ortells E-mail M.O.Ortells at bath.ac.uk University of Bath, Bath, UK.