OXIDOREDUCTASE, NP_348178.1, PUTATIVE NADH OXIDASE, STRUCTURAL GENOMICS, JOINT CENTER FOR STRUCTURAL GENOMICS, JCSG, PROTEIN STRUCTURE INITIATIVE, PSI-2, NITROREDUCTASE FAMILY 3E10 CRYSTAL STRUCTURE OF PUTATIVE NADH OXIDASE (NP_348178.1) FROM CLOSTRIDIUM ACETOBUTYLICUM AT 1.40 A RESOLUTION