NMR Spectroscopy has been used to interpret dynamics of unfolded proteins. However, 15N relaxation data of unfolded proteins are difficult to analyze using standard approaches due to the presence of an ensemble of states (93JMB1125-229, 94JMB527-242, 97BIO2390, 95PRO2605, 97BIO13043, 98BIO17054). Novel approaches have been reported that can better explain the observed relaxation data of such unfolded states ( 99JACS8671 ).