Abstract
The structure of copper binding site in bovine serum amine oxidase (BSAO) treated with diethyldithiocarbamate ion (DDC) was discussed by comparing its absorption and electron spin resonance spectra with those of a model copper complex. The structure of the model complex, (Cu(2,2'-bipyridine) (DDC)) super(+), suggested that at least two nitrogen atoms are coordinated around the copper ion in the native BSAO. Some organic chromophore from which the pink color of BSAO stems was also observed as the difference of the absorption spectra in the region of 450 to 600 nm between BSAO-DDC and the model complex.