Structure of crystalline α-chymotrypsin

Refined atomic co-ordinates for tosyl-α-chymotrypsin have been obtained by computational refinement of co-ordinates derived from a carefully built atomic model. The two independent views of the molecule obtained from crystallographic analysis are almost identical. The structure of the enzyme is described in terms of conformational angles, hydrogen-bonding networks and the environment of different types of amino-acid side chain. The polypeptide...