OXIDOREDUCTASE, YP_322669.1, PUTATIVE NITROREDUCTASE, STRUCTURAL GENOMICS, JOINT CENTER FOR STRUCTURAL GENOMICS, JCSG, PROTEIN STRUCTURE INITIATIVE, PSI-2, OXIDOREDUTASE 3EO7 CRYSTAL STRUCTURE OF PUTATIVE NITROREDUCTASE (YP_322669.1) FROM ANABAENA VARIABILIS ATCC 29413 AT 1.80 A RESOLUTION