Resolved librational motions of gramicidin-S and glutathione dimer as studied by nuclear magnetic resonance spectroscopy

Abstract

A theory relating ¹³C n.m.r. relaxation parameters to molecular motion at three levels is described, and successfully subjected to unusually regorous experimental test. The result give information on mean conformations and on rates of internal librational motions for gramicidin-S and for glutathione dimer. They also confirm some previous conclusions regarding proteins, although in this case the model is more approximate.