3EJ8 STRUCTURE OF DOUBLE MUTANT OF HUMAN INOS OXYGENASE DOMAIN WITH BOUND IMMIDAZOLE OXIDOREDUCTASE, NITRIC OXIDE SYNTHASE, NOS, HEME, TETRAHYDROBIOPTERIN, OXIDOREDUCTASE CALMODULIN-BINDING, FAD, FMN, IRON, METAL- BINDING, NADP, POLYMORPHISM, ZINC