Conformational Entropy from Restricted Bond-Vector Motion in Proteins: The Symmetry of the Local Restrictions and Relation to NMR Relaxation.

Locally-mobile bond-vectors contribute to the conformational entropy of the protein, given by Sk = S/k = −∫ (Peq ln Peq) dΩ − ln ∫ dΩ. The quantity Peq = exp(u)/Z is the orientational probability d...