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:  We show here that Bright has multiple contextual requirements to function as a transcriptional activator .

A: transcriptional activator
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Q:  The experiments with intact human lymphoblasts suggest that assays of specific glucocorticoid - binding capacity do not necessarily reflect the cellular content of receptor protein .

A: receptor protein
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Q:  In contrast , expression of constitutively active MEK1 , which activates ERK pathway , enhanced RXRE - dependent activation .

A:
constitutively active MEK1
****