Absorption spectra and
HPLC chromatograms of M quercetin at pH 6.0 in absence (a), (b)
and presence (c), (d) of 20 nM MPO. 50 μM was present
in all reaction solutions. Spectra were recorded over a period of 30 minutes;
arrows indicate the direction of the change. Chromatograms were recorded after
30 minutes (b) at and (d) at .