锌-牛血清白蛋白的电荷转移谱带研究

Study on the LMCT Band of Zinc-bovine Serum Albumin

研究了 1∶1锌 牛血清白蛋白体系的差示吸收光谱 ,使用文献数据计算了组氨酸咪唑基的三个π轨道的光学电负性 ,利用这些数据归属了Zn2 +离子与牛血清白蛋白所形成的配合物的两条电荷转移谱带 ,推测它们分别为白蛋白组氨酸咪唑基的π2 ,π3轨道向Zn(Ⅱ )离子的LMCT跃迁。

The structure of metal centre in 1:1 zinc-bovine serum albumin complexes have been studied with UV spectrum. The data from literature is used to calculate the optical electronegativity of three pi orbits of histidyl imidazole. Using these data, we infer that two charge transition bands of complex of zinc ions and bovine serum albumin come from transition of pi (2), pi (3) electrons of histidyl imidazole to zinc ions.