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Related Experiment Videos

Sequence of the OR operator of phage lambda.

V Pirrotta

    Nature
    |March 13, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Researchers identified a 79-nucleotide sequence in the lambda OR operator. This DNA sequence contains the primary repressor binding site and potential secondary binding sites, offering insights into genetic regulation.

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    Area of Science:

    • Molecular Biology
    • Genetics
    • Biochemistry

    Background:

    • The lambda OR operator is a critical regulatory region in bacteriophage lambda.
    • Understanding repressor binding sites is essential for deciphering gene expression control.

    Purpose of the Study:

    • To determine the precise nucleotide sequence of the lambda OR operator involved in repressor binding.
    • To identify potential primary and secondary repressor binding sites within this sequence.

    Main Methods:

    • Primed transcription was used to analyze repressor-protected DNA fragments.
    • Nucleotide sequencing was performed on the isolated DNA fragments.

    Main Results:

    • A 79-nucleotide sequence from the lambda OR operator was successfully obtained.

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  • The identified sequence encompasses the primary repressor binding site.
  • Partial duplications within the sequence suggest the presence of secondary repressor binding sites.

    • Conclusions:

    • The 79-nucleotide sequence provides a detailed map of repressor interactions within the lambda OR operator.
    • The identified secondary binding sites may play a role in modulating repressor binding affinity and gene regulation.