Negative regulator of transcription

UniProtKB accession:  P06020

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UniProtKB description:  Switches off the PcM promoter thereby blocking expression of the major repressor Repc (latency factor) and favoring transcription from the early promoter (Pe) and hence viral transposition and lytic development. Negatively regulates the early promoter (Pe) thereby controlling its own expression and keeping the level of early genes expression independent of the viral genome copy number.