title: EPR non-detectable copper in pyridoxal biogenic amine Schiff base complexes.
mesh_terms: D003300:Copper; D004578:Electron Spin Resonance Spectroscopy; D009655:Octopamine; D011730:Pyridoxal; D011732:Pyridoxal Phosphate; D012545:Schiff Bases
chemical_list: D012545:Schiff Bases; D009655:Octopamine; D011730:Pyridoxal; D011732:Pyridoxal Phosphate; D003300:Copper