Tags: Protein.
In molecular biology the Cro repressor family of proteins includes the bacteriophage lambda Cro repressor.Bacteriophage lambda encodes two repressors: the Cro repressor that acts to turn off early gene transcription during the lytic cycle and the lambda or cI repressor that is required to maintain lysogenic growth. Together the Cro and cI repressors form a helix-turn-helix (HTH) superfamily. The lambda Cro repressor binds to DNA as a highly flexible dimer.