Observation and relaxation properties of individual fast-relaxing proton transitions in [13CH3]-methyl-labeled, deuterated proteins

► Experiments are presented for separation of individual 1H transitions in methyls. ► Intra-methyl 1H-1H/1H-13C cross-correlations in these transitions are quantified. ► 1H-1H/1H-13C cross-correlations serve as good measures of side-chain ordering.