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Dr. Jean A. Wyer, Anders V. Jørgensen, Bjarke Møller Pedersen and Prof. Steen Brøndsted Nielsen Gas-Phase Spectroscopy of Ferric Heme[BOND]NO Complexes ChemPhysChem 14

Version of Record online: 25 OCT 2013 | DOI: 10.1002/cphc.201300843

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Not so innocent: Weakly bound complexes between ferric heme and NO were synthesised in the gas phase, and their absorption measured from photodissociation yields. Opposite absorption trends in the Soret-band are seen upon NO addition to heme ions in vacuo and to ferric heme proteins, demonstrating the perturbing effect of the protein environment or the axial amino acid ligand, in contrast to Q-band absorption, where the environment is nearly innocent.

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