The PISA service at the EBI does exactly this msdpisa Either download a pdb or use the CCP4 GUI to run a cut down version of it in house Eleanor Kay Diederichs wrote: > Hi, > > check out > http://strucbio.biologie.uni-konstanz.de/ccp4wiki/index.php/Servers_and_programs_for_sequence_analysis > > > HTH, > > Kay