1. This gene encodes one member of a family of translation repressor proteins . 2. The specific binding site for the Lac-repressor protein is the operator. 3. During normal growth, the SOS genes are negatively regulated by LexA repressor protein dimers. 4. For example, some repressor proteins can bind to the core promoter to prevent polymerase binding. 5. In the case of the Ifg2 and H19 genes, CTCF, a transcriptional repressor protein , is involved. 6. These act by silencers bind repressor proteins and make the DNA less available for RNA polymerase. 7. The degree of repression is determined by the concentrations of the repressor protein and corepressor level. 8. The Nanos protein is a translational repressor protein . 9. Activator of apoptosis Hrk regulates apoptosis through interaction with death-repressor proteins Bcl-2 and Bcl-X ( L ). 10. The tetracycline repressor protein ( TetR ).
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