title: Determination of the zero-field splitting of Fe 3+  in heme proteins from the temperature dependence of the spin-lattice relaxation rate.
mesh_terms: D000818:Animals; D002591:Cetacea; D004578:Electron Spin Resonance Spectroscopy; D006418:Heme; D007501:Iron; D008433:Mathematics; D009211:Myoglobin; D010084:Oxidation-Reduction; D011487:Protein Conformation
chemical_list: D009211:Myoglobin; D006418:Heme; D007501:Iron