Hydration-dependence of the functional core high-amplitude motions. SH-PM mean-square displacements derived from IN16 data at 57% RH (A), 75% RH (B), 86% RH (C), and 93% RH (D), shown as open diamonds. In every panel, the 〈u2〉 values of the dry SH-PM (solid diamonds) are also shown for comparison.