Hi Rex PDBSET (SEQUENCE keyword) does this, i.e. either 3 or 1 letter codes. Cheers -- Ian On Sun, Apr 4, 2010 at 2:55 PM, Rex Palmer <[log in to unmask]> wrote: > Is there software that will extract a protein sequence in either 3 letter or > single letter code from a given pdb file? > > Rex Palmer > Birkbeck College