In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 A surge in the rate of ascorbyl radical production , directly correlated with oxyradical stress and an abrupt fall in superoxide dismutase activity in the granuloma , indicates ' switching on ' of a free radical - dependent machinery for the formation of granuloma after vasectomy .
superoxide dismutase