Circular dichroism spectra of oxidized human MAO-B, mofegiline inhibited MAO-B, and of known MAO-B flavin N(5) adducts. Oxidized MAO-B (), After inhibition by mofegiline (), the MAO-B N(5) flavin adduct formed after inhibition by pargyline (), and the MAO-B N(5) flavin adduct formed after inhibition by phenylethylhydrazine (). All spectral data were acquired in 50 mM potassium phosphate, pH 7.5 containing 0.8% (w/v) β-D-octylglucoside.