6CYANA: distances check - CYANA command

Parameters: selection=<string>             (default: <blank>)

This command reports for each selected distance restraint a score
that indicates how well the distance restraint is embedded in the
network of all (selected and unselected) distance restraints. Scores
are computed only for distance restraints between atoms that are
three or more residues apart from each other.

The score is computed as the sum of the terms 1 / ((1 + k1) * (1 +
k2)) over all other distance restraints with both atoms in the same
or directly neighboring residues as the two atoms of the restraint
under consideration, where k1 and k2 denote the absolute residue index
differences between the two first atoms and the two second atoms of
the two restraints.

A high score means that the distance restraint is well supported
by other restraints. A low score indicates "lonely" and therefore
"dangerous" restraints with a potentially high impact on the calculated
3D structure.

Further reading:

- Mumenthaler & Braun. J. Mol. Biol. 254, 465-480 (1995).
