3, A chelating agent which forms an easily water-soluble metal chelated compound such as nitrilotriacetate (NTA) or ethylene diamine tetraacetate (EDTA) is incorporated in a detergent composition.

在洗衣粉中掺入螯剂，例如次氮基三乙酸酯（NTA）或者是乙乙酸酯（EDTA），这些螯剂易于形成水金属螯物。

The expression product of ScFv was purified through Ni-NTA agarose metal affinity resin column and renatured.

经金属螯亲和层析柱(Ni-NTA agarose)纯化和凝胶柱上在位复后，ELISA结果证实其具有良好结β3抗原活。