Absorbance spectra of GAD showed one weak peak at 420nm, it was produced by the binding of PLP.

• 米胚GAD的紫外-可见光谱特征为除280nm以下与蛋白质有关的吸收峰以外,420nm处有一个弱吸收峰,这是PLP与米胚GAD主链结合后产生的吸收峰。