For the crambin CA model, calculate (a) the N-to-C terminal separation and (b) the maximum distance over all pairs of CA sites. Identify the residues attaining the maximum and quantify how much the terminal distance underestimates this maximum. Would a terminal-distance measurement alone describe this model's full spatial extent? Coordinates are in angstrom (1 nm = 10 angstrom). XYZ atom rows are one-based after the two header lines. Use the supplied coordinate snapshots without optimization, crystallographic symmetry expansion or periodic wrapping. These are explicitly selected-site models, not complete all-atom or solution-ensemble models. Use S0007 only: all 46 C-alpha sites of 1CRN chain A, row i = residue A:i. N-terminal site is Thr A:1; C-terminal site is Asn A:46. Define Dmax=max_(i