A simple analytical method was proposed to back-predict methyl group Lipari-Szabo-type sub-τc order parameters from static protein structures based on the distribution of local contacts around methyl carbons and the number of χ angles to the backbone (Ming and Brüschweiler 2004). Interestingly, since a similar correlation coefficient is obtained from the back-predicted order parameters, (individual data not shown, correlation coefficient r = 0.66), it is reasonable to suppose that this simple local contact model would also apply in the supra-τc time window.