I'd google for "Bart Hazes" and "SSBOND" myself. There is (or was) a server, and the publication is Prot. Eng. 1988, 119, 25 (PMID 3244694). The server seems to be down or has moved.
HTH, Fred. > Message du 04/03/12 05:07 > De : "Naveed A Nadvi" > A : CCP4BB@JISCMAIL.AC.UK > Copie à : > Objet : [ccp4bb] Disulfide bonds > > Hello everyone, > > I was wondering if there is any information available regarding the range of > Ca-to-Ca distances between two cysteine residues forming disulfide bonds. Is > there any software available for analysing the PDB for this kind of > information? Some old textbooks suggest a distance of 4.4-6.8 A. I would very > much appreciate any comments or suggestions you may have. > > Regards, > > Naveed > > Faculty of Pharmacy, > The University of Sydney >