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.
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Question:  Glucocorticoid antagonists are steroids that interact with the receptor but either fail to produce a stable complex or produce a stable but inefficient complex .

Answer: stable complex


Question:  Regulation of chemokine mRNA expression in a rat model of vanadium - induced pulmonary inflammation .

Answer: chemokine mRNA


Question:  Progesterone receptor ( PR ) level was analyzed in some specimens with the use of a similar method .

Answer:
Progesterone receptor