The solution conformation and dynamics of biomolecules in the presence of internal motions: The use of jump models for the 1H NMR analysis of relaxation data

A jump model has been used to obtain motional information from proton relaxation parameters in complex molecular systems in which multiple internal motions are present. The proposed analysis takes into account changes in orientation and magnitude of interproton vectors, due to overall and internal motions. Intrinsic relaxation contributions can be calculated if the probability for each spatial configuration is independently known. From these contributions jump frequencies may be evaluated, yielding information on local molecular mobility. © 1982 Società Italiana di Fisica.