用生物传感器测定人源性抗角蛋白Fab抗体的亲和力

来源 :中国皮肤性病学杂志 | 被引量 : 0次 | 上传用户:llllgy
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目的采用生物传感器测定人源性抗角蛋白Fab抗体的亲和力.方法异丙基硫代-β-D-半乳糖苷(IPTG)诱导原核细胞表达4株抗角蛋白Fab抗体,采用镍亲和层析柱进行纯化,应用生物传感器测定其亲和力,并从中选出亲和力最高的抗体.结果成功表达和纯化了4株抗角蛋白Fab片段;其亲和常数分别为:FK315为8.53387×107 mol/L;RRK2为4.51815×106 mol/L;A4为5.50908×106 mol/L;K2 hab为4.76743×106 mol/L;以FK315抗体的亲和力最高.结论应用生物传感器可以精确测定基因工程抗体Fab片段的亲和力,高亲和力抗体克隆FK315的选择为该抗体的进一步应用研究提供了重要依据.
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