锌通过与氨基酸中硫和氮原子的共价结合 ,在维系蛋白质三级结构和发挥其特定的功能中 ,具有重要生理作用。在免疫系统中 ,锌为淋巴细胞的周期变化和增殖所必需 ;锌通过调节 DNA聚合酶等一系列酶活性参与核酸代谢的调控 ;在淋巴细胞活化中 ,锌也参与细胞的一系列磷酸化过程。锌的存在 ,可防止淋巴细胞凋亡。作为一种抗氧化剂 ,锌可保护淋巴细胞膜免于氧自由基的损害 Zinc, through its covalent attachment to the sulfur and nitrogen atoms in amino acids, has important physiological roles in maintaining the tertiary structure of proteins and in exerting their specific functions. In the immune system, zinc is necessary for the cycle changes and proliferation of lymphocytes; zinc is involved in the regulation of nucleic acid metabolism by regulating a series of enzyme activities such as DNA polymerase; and in the activation of lymphocytes, zinc is also involved in a series of phosphorylation processes in cells . The presence of zinc prevents lymphocyte apoptosis. As an antioxidant, zinc protects lymphocyte membranes from the damage of oxygen free radicals