Described are copolymers comprising the copolymer-constituting units characterized in the claims and having an average molecular weight of 400 to 20,000. Furthermore superoxide dismutase (SOD) derivatives are described which can be obtained by modification with the above copolymers and have a single chemical structure, retain most of the enzymatic activity of SOD and exhibit a much prolonged plasma half-life. Therefore, they are useful as medicinal chemicals.
所述的共聚物包括权利要求所述的共聚物构成单元,其平均分子量为 400 至 20000。此外,还描述了超氧化物歧化酶(SOD)衍
生物,这些衍
生物可通过上述共聚物改性获得,具有单一的
化学结构,保留了 SOD 的大部分酶活性,并大大延长了血浆半衰期。因此,它们可用作医药
化学品。