Thanks for the quick reply. This is a very good resource but not quite what I need. As far as I can tell, this resource is based on a dataset from 10-08-1998 and then only included x-ray crystal structure with better than 2 angstrom data. I also can't in this database a mention of the PDB structures in which e.g. the shortest His-His distances have been observed. - C On Tue, Mar 8, 2011 at 6:19 PM, Ed Pozharski <[log in to unmask]> wrote: > On Tue, 2011-03-08 at 17:44 -0500, Cale Dakwar wrote: > > Amongst other things, I want e.g. generate a histogram from this table > > and determine e.g. the shortest HisND1 pair distance observed and the > > structure in which this happens. > > For this specific question this can be useful > > http://www.biochem.ucl.ac.uk/bsm/sidechains/index.html > > > > -- > "I'd jump in myself, if I weren't so good at whistling." > Julian, King of Lemurs > >