hola, SG> Frankie, how's life treating you? I'll get back to you re: scoring matrices in my next email. hehe thanks for asking, im almost over the hill ;) At this time im playing with some different global alignment algorithms. Im curious if the traceback procedure is the same in all those algorithms, for i could have a single tracebackfunction for all of them. So anyone has a comprehensive list of the different algorithms with a short description or a nice link? -- Best regards, frank mailto:asseg@ukl.uni-freiburg.de