We examine interatomic distance fluctuations and displacementcorrelations in orthorhombic hen egg-whitelysozyme using results from a 1 ns molecular dynamics trajectory of thecrystalline unit cell. It is foundthat locally in the sequence the atoms are both highly correlated andundergo low relative fluctuations.Those nonlocal elements of the structure that undergo low relativefluctuations are located largely withinsecondary structural elements in the β domain. The canonicalcorrelation matrices of the four lysozymemolecules in the unit cell are markedly different and have notconverged.