... addition, the nitrile function may beattached to cysteines of the protein introduced at Fig. 1. Schematic presentation of the potential distribution at the membrane–solution interface (top) and at the ... 2).Second, the frequencies of these marker bands notonly respond to changes in the oxidation state of the central haem iron, but also reflect alterations in the coordination sphere, such that these ... choosing excitationlines in resonance with an electronic transition of the cofactor of the protein, to selectively enhance thoseRaman bands that originate from the chromophoricpart of the macromolecule...