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Stereoview overlay of Cα atoms for λ-exonuclease (yellow) and PvuII (cyan) protein fragments (a) and λ-exonuclease (yellow) and EcoRV (magenta) protein fragments (b). The segments shown include all of the regions of structural similarity identified by the Dali database server (Table 1). Figure prepared by using molscript (26) and rendered with raster3d (27, 28).
