we wish to modify the patmatdb program to search for say 70% similarity to the prosite pattern. How can this be done? Is there a c program source of the prosite scan program available? regards krishnaswamy -- S.Krishnaswamy School of Biotechnology Madurai Kamaraj University Madurai 625 021, India mkubic9 at giasmd01.vsnl.net.in krishna at mrna.tn.nic.in