Correlation of the methyl rotamer entropy versus O2axis from MD simulations. Normalized entropy Sb/Nχ given for every side chain methyl probe. The correlation was highly linear (R2 of 0.77) with a slope of −0.88 ± 0.03 and an intercept of 0.78 ± 0.02. The different proteins are represented as follows: () Ubiquitin, () α3D, () Calmodulin-smMLCkp, () Calmodulin-nNOSp, () Hen Egg White Lysozyme, () Adipocyte lipid binding protein, () Cytochrome c2.