Comparison of theoretically (curves labeled GNM and ANM) calculated B-factors with those measured with x-ray crystallography (labeled EXP) for (a) HA1 and (b) HA2 residues in the neutral pH trimeric structure (Weiss et al., 1990b). The insets display the correlation between theoretical and experimental data. 

Three monomers exhibit practically the same fluctuation behavior in experiments; and their almost indistinguishable behavior is confirmed by the theoretical calculations.