Cistron


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Related to Cistron: Polycistronic

cistron

[′sis‚trän]
(cell and molecular biology)
The genetic unit (deoxyribonucleic acid fragment) that codes for a particular polypeptide; mutants do not complement each other within a cistron. Also known as structural gene.

Cistron

 

a unit of genetic material responsible for a single function. The term “cistron” was introduced by the American geneticist S. Benzer in 1957 together with the terms “recon”—the smallest unit of deoxyribonucleic acid (DNA) capable of recombination—and “muton”—the smallest unit of DNA in which a change can result in a mutation. Benzer hypothesized correctly that all three units are sections of the nucleic acid molecule that differ from one another in length. In size the cistron is equal on the average to 1,200 nucleotides, with the number of nucleotides generally varying from 400 to 4,000. In modern genetics, a cistron is generally defined as the unit in nucleic acid that codes the structure of a single polypeptide. Consequently, the terms “cistron” and “gene” are synonymous.

REFERENCE

Fiziologicheskaia genetika. Leningrad, 1976.
References in periodicals archive ?
In the cytotype C1, major ribosomal DNA cistrons are located in the terminal position of the short arms of the first metacentric as determined by silver nitrate impregnation (Figure lb) and FISH with the 18S rDNA probe (data not shown).
Gene Database: Organism relation Organism Organ_Name Symbol DBx Int Primary Key Varchar2 Varchar2 Varchar2 Description Varchar2 Cistron Database: Organism relation Organism OrgName CHRO DBReference Int Primary Key Varchar2 Varchar2 Varchar2 Foreign Key Description Varchar2 Global Schema: Our proposed model Organism OrgName CHRO DBReference Description Symbol DBx Global Schema: [2, 3, 11, 13, 19] Organism OrgName CHRO BBx and DBReference Description Symbol
Este trabalho teve por objetivo isolar e identificar isolados de Guignardia oriundos de citros, mangueira, goiabeira, eucaliptos, jabuticabeira e pitangueira, bem como caracterizar a diversidade genetica existente atraves da analise da sequencia de DNA do cistron ITS1-5,8S-ITS2.
ITS) of the nuclear rDNA cistron are important for understanding
9 kb) inverted repeat containing the rRNA cistrons, 30 tRNA genes, 44 genes encoding proteins for photosynthesis, 44 ribosomal protein genes (26 large subunit and 18 small subunit), 5 genes for biosynthetic function, 19 genes involved in gene expression (including 3 hypothetical chloroplast reading frames or ycfs), 25 additional ycfs, and 9 open reading frames (ORFs) larger than 50 amino acids.
He holds a PhD in endocrinology from Imperial College, UK, and has worked as manager for immunodiagnostics with the UK subsidiary of Boehringer Mannheim (now owned by Roche), and as an independent biomedical market analyst with Cistron, UK.
Tenders are invited for laying of 110 mm dia pvc pipe line from reddy well to dhurgamma temple, new bore, cistron tank, 10 hp motor, 50 mm gi pipe, cable wire,panel board etc.
Most widely used has been the nuclear ribosomal RNA cistron (rDNA), or portions thereof [ILLUSTRATION FOR FIGURE 1 OMITTED].
Dondero held increasing levels of responsibility at Cistron Biotechnology, Inc.
Tenders are invited for laying of 110 mm pvc pipe line in 10 th ward from glsr tank to old cistron tank, new bore, 10 hp motor, 50 mm gi pipe, cable wire, panel board etc.