Definition of cistron in English:


Line breaks: cis|tron
Pronunciation: /ˈsɪstrɒn


  • A section of a DNA or RNA molecule that codes for a specific polypeptide in protein synthesis.
    More example sentences
    • Almost all eukaryotes have multiple copies of their nuclear ribosomal RNA cistrons, arranged in a long tandem array.
    • Benzer called this unit the ‘cistron’; molecular biologists came to view the cistron as the nucleotide sequence encoding a single polypeptide.
    • We find that full function of the endogenous rDNA locus depends not merely on the presence of the rDNA cistrons but also on chromosomal context.


1950s: from cis- ( sense 2) + trans- (because of the possibility of two genes being on the same or different chromosomes) + -on.

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