The purified enzyme exhibited a single zone in 10% polyacrylamide gel electrophoresis, and contained two polypeptides with molecular weight of about 24,000 and 26,000 dalton respectively.

• 纯化的TdT聚丙烯酰胺凝胶电泳呈一条区带,SDS-聚丙烯酰胺凝胶电泳分子量为24,000及26,000d的两条区带。