A number of protocols that are described in Chapter 20 incorporate disulfide bonds as distance restraints:
assign (resid 3 and name sg) (resid 31 and name sg) 2.02 0.1 0.1 assign (resid 5 and name sg) (resid 20 and name sg) 2.02 0.1 0.1 assign (resid 10 and name sg) (resid 30 and name sg) 2.02 0.1 0.1Hydrogen bonds (e.g., between base pairs in nucleotide structures) can be restrained in a similar manner.