The purified enzyme shows the typical spectrum of flavoprotein with A 273/A 460 ratio being 5.8. The purified enzyme migrates as a single band on SDS-polyacrylamide gel electrophoresis,exhibits a molecular weight of 32000 dalton.

• 纯化的酶是典型的黄素蛋白吸收光谱，A273/A460比值为5.；8。 在SDS－聚丙烯酸胺凝胶电泳板上呈单一的蛋白质区带，分子量为32kd。