Fig. 2

a Plot of \( {k}_{direct} \) versus cutoff distance. The minimum cutoff that can be used for both the fibronectin crystal structures is \( {R}_c \) = 4.8 Å (below this, more than six zero eigenvalues are obtained). Hence, cutoffs from 5.0 Å have been shown here (b) Plot of \( {k}_{direct} \) versus cumulative normal modes \( \left({\mathrm{N}}_{\mathrm{modes}}\right) \), for the two fibronectin domains \( {\mathrm{FNIII}}^{12} \) and \( {\mathrm{FNIII}}^{13} \) (named as FN1 and FN2 respectively) at \( {\boldsymbol{R}}_{\boldsymbol{c}} \) = 5.0 Å. FN1 has 680 heavy atoms (\( {\mathrm{N}}_{\mathrm{modes}} \) =2034) and FN2 has 691 heavy atoms (\( {\mathrm{N}}_{\mathrm{modes}} \) =2067)