3IR6 CRYSTAL STRUCTURE OF NARGHI MUTANT NARG-H49S OXIDOREDUCTASE, NITRATE REDUCTASE, ELECTRON TRANSFER, MEMBRANE PROTEIN, 4FE-4S, CELL MEMBRANE, ELECTRON TRANSPORT, IRON, IRON-SULFUR, MEMBRANE, METAL-BINDING, MOLYBDENUM, NITRATE ASSIMILATION, TRANSPORT, 3FE-4S, CELL INNER MEMBRANE, FORMYLATION, HEME, TRANSMEMBRANE