CRYSTAL STRUCTURE OF THE TRIPLE MUTANT (N23C/D247E/P249A) OF 3-DEOXY-D-MANNO-OCTULOSONATE 8-PHOSPHATE SYNTHASE (KDO8PS) FROM NEISSERIA MENINGITIDIS 3FYO TRANSFERASE, MANNO-OCTULOSONATE, SYNTHASE, LIPOPOLYSACCHARIDE, KDOP, KDO8 KDOPS, KDO8PS, TIM BARREL, BIOSYNTHESIS, LYASE, CYTOPLASM, LIPOPOLYSACCHARIDE BIOSYNTHESIS