' For pt.I see ibid., vol.104, p.4546 (1982). In the preceding paper it
has been shown that the unique dynamic information on fast internal m
otions in an NMR relaxation experiment on macromolecules in solution i
s specified by a generalized order parameter, S , and an effective cor
relation time, tau /sub e/. The authors now deal with the extraction a
nd interpretation of this information. The procedure used to obtain S
/sup 2/ and tau /sub e/ from experimental data by using a least-square
s method and, in certain favorable circumstances, by using an analytic
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