. "Lattman, E.E." . "Libson, A." . "Gittis, A." . "1ENC" . "STAPHYLOCOCCAL NUCLEASE (E.C.3.1.31.1) MUTANT WITH ASP 21 REPLACED BY GLU (D21E) COMPLEXED WITH A CALCIUM ION AND THE INHIBITOR THYMIDINE 3',5'-DIPHOSPHATE" . "CRYSTAL STRUCTURES OF THE BINARY CA2+ AND PDTP COMPLEXES AND THE TERNARY COMPLEX OF THE ASP 21->GLU MUTANT OF STAPHYLOCOCCAL NUCLEASE. IMPLICATIONS FOR CATALYSIS AND LIGAND BINDING" . . . . . . . . .