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.

Q:  No evidence for the existence of a specific progesterone receptor in human mononuclear leukocytes was obtained as judged by the results of competition experiments where a progesterone receptor - specific ligand [ 3H ] Org 2058 was used .

A: progesterone receptor
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Q:  Inhibition of PA in both cell types is specific for active glucocorticoids , and this specificity parallels the ability of various steroids to bind to glucocorticoid receptors .

A: glucocorticoid receptors
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Q:  The results showed that HIV - 1 production was strongly induced .

A:
HIV - 1
****