The N-terminal arms of lambda repressor wrap around the operator DNA.
From differences in the ability of fragments of the lambda repressor to protect operator bases from chemical modification we suggest that the first few N-terminal residues of the lambda repressor form an extended arm that reaches around the back of the DNA helix when repressor binds to the operator.
D000595:Amino Acid Sequence; D001483:Base Sequence; D004269:DNA, Bacterial / Q000378:metabolism*; D004268:DNA-Binding Proteins; D006147:Guanine / Q000378:metabolism; D008745:Methylation; D008957:Models, Genetic; D009876:Operon; D010446:Peptide Fragments / Q000032:analysis / Q000378:metabolism; D012097:Repressor Proteins / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*; D014357:Trypsin / Q000494:pharmacology; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins
D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; D010446:Peptide Fragments; D012097:Repressor Proteins; D014157:Transcription Factors; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins; C016649:phage repressor proteins; D006147:Guanine; D014357:Trypsin