BIOSYNTHETIC PROTEIN, 3-KETO-L-GULONATE-6-PHOSPHATE DECARBOXYLASE, ULAD, NIAID, CSGID, MG-BOUND, STRUCTURAL GENOMICS, NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES (NIAID), CENTER FOR STRUCTURAL GENOMICS OF INFECTIOUS DISEASES X-RAY CRYSTAL STRUCTURE OF THE MG-BOUND 3-KETO-L-GULONATE-6- PHOSPHATE DECARBOXYLASE FROM VIBRIO CHOLERAE O1 BIOVAR EL TOR STR. N16961 3JR2