[ccp4bb]: Disulfide bridge

[<deh22@cornell.edu>]

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Dear all,

Has anyone ever seen a disulfide bridge that looks something like this:

Cys-S-?-S-Cys

If I force the disulfide bridge, the geometry does not fit the density
at all.  If I let the sulfurs fit into the density correctly, the
geometry does not work for a disulfide, although there is very clear
density between the sulfurs.

Any suggestions?

Thanks,
Darrell Hurt