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: In epithelial cells , defensin genes are found as both constitutively expressed and inducible .

Answer: defensin genes

Question: We show here that E2A DNA binding is lowered in primary immature thymocytes consequent to T cell receptor ( TCR ) - mediated ligation .

Answer: T cell receptor

Question: A stable and stoichiometric complex of CaMKIV with protein serine - threonine phosphatase 2A ( PP2A ) was identified in which PP2A dephosphorylates CaMKIV and functions as a negative regulator of CaMKIV signaling .

Answer:
negative regulator