Instead, their test tube was filled with some "contaminant": A high molecular weight polymer they would soon identify as the first actin-binding protein, later called filamin A.

另一，们试管充满了一些“污染物”：一种们即鉴别，相当于第一个肌动蛋白结合蛋白子质量聚合物，后来被称为细丝蛋白A。