CRYSTAL STRUCTURE OF D-LACTATE DEHYDROGENASE FROM AQUIFEX AEOLICUS COMPLEXED WITH NAD AND LACTIC ACID 3KB6 OXIDOREDUCTASE, D-LDH, NAD, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI