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研究了金属离子Ｃａ２ ＋ 和Ｔｂ３ ＋ 对长白山白眉蝮蛇蛇毒磷脂酶Ａ２（ｐｈｏｓｐｈｏｌｉｐａｓｅ Ａ２） 荧光光谱的作用， 发现Ｃａ２ ＋ 浓度的增加能够增强磷脂酶Ａ２ 的荧光发射强度． 而且Ｃａ２ ＋ 浓度的增大能够明显加快磷脂酶Ａ２ 与其相应反应底物ＤＰＰＣ的反应速率． 稀土离子Ｔｂ３ ＋ 在低浓度条件下对磷脂酶Ａ２ 起荧光淬灭作用， 而在浓度较高时能够提高磷脂酶Ａ２ 荧光发射强度．
The effects of metal ions Ca2 + and Tb3 + on the fluorescence spectra of phospholipase A2 in Changbai Mountain snakehead snake venom were studied. It was found that the increase of Ca2 + concentration can enhance the fluorescence emission intensity of phospholipase A2. Moreover, the increase of Ca2 + concentration can obviously accelerate the reaction rate of phospholipase A2 and its corresponding reaction substrate DPPC. The rare earth ion Tb3 + has a fluorescence quenching effect on phospholipase A2 at low concentration, but increases phospholipase A2 fluorescence emission intensity at higher concentration.