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.

 Inhibition of DNA topoisomerase II alpha gene expression by the p53 tumor suppressor .
p53 tumor suppressor

 Elements regulating cell - and stage - specific expression of the C . elegans MyoD family homolog hlh - 1 .
hlh - 1

 Plasma renin activity in essential arterial hypertension .

Plasma renin