2/2 hemoglobins Bacterial Proteins Crystallography, X-Ray Dioxygenases Heme Kinetics Molecular Dynamics Simulation Mutation Mycobacterium tuberculosis NO dioxygenase Nitric Oxide Peroxynitrous Acid Protein Conformation Protein Multimerization Truncated Hemoglobins X ray crystallography bacterial protein chemistry dioxygenase genetics globin dynamics heme heme/ligand tunneling kinetics metabolism molecular dynamics mutation nitric oxide peroxynitrous acid protein conformation