The progesterone receptor (PR)is a steroid hormone receptor and transcription factor.The protein SRC-1,which does not bind DNA by itself,can bind to PR and increase expression of genes regulated by PR.Based on this information,SRC-1 is a(n)

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SRC-1 acts as a coactivator by binding to the PR and increasing expression of genes regulated by PR. It does not bind DNA by itself, so it does not act as a transcription factor or basal transcription factor. It is also not an inducer or specific transcription factor.

The Progesterone Receptor (PR)is a Steroid Hormone Receptor and Transcription