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A section of a DNA or RNA molecule that codes for a specific polypeptide in protein synthesis.
- ‘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.’
- ‘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.’
- ‘Molecular evolution of the rDNA cistron in these plants typically follows the same trajectory.’
- ‘The estimate was defined at the scale of cistrons so as to exclude the possibility of recombination.’
1950s: from cis- + trans- (because of the possibility of two genes being on the same or different chromosomes) + -on.
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