... values) in the inactivated enzyme was confirmed. As in the case of DABY, the cofactor topaquinone is not modified by thereaction, as demonstrated by an unchanged quinone redoxstaining.Absorption ... Toassess the in uence of ionic strength on the reaction, 0.1MBritton–Robinson buffer, pH 7.2, containing variablepotassium chloride was used. Rapid scanning of absorptionspectra of GPAO or ... cyclic imines 1-pyrroline and 1-piperideineformed upon enzymative oxidation of putrescine and cadaverine, respectively. In acidic medium, DMAB and DMAC reacted with the DAPY oxidation product(and...