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:  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


Question:  There was no marked correlation between glucocorticoid receptor levels and in vitro sensitivity .

Answer: glucocorticoid receptor


Question:  The results provide direct evidence that angiotensin II acting via the AT1a plays a pivotal role in the development of tubulointerstitial fibrosis in UUO .

Answer:
angiotensin II


