Disulphide bond checks
The following checks are made on disulphide bonds:-
The S-S separation in each disulphide bond is compared with the ideal distance of
2.0Å
The chi-3 torsional angle, defined by the S-S bridge, is compared against the ideal values:
-85.8 degrees
for a
left-handed
conformation
96.8 degrees
for a
right-handed
conformation
Significant deviations from the ideal values are highlighted.