cistron


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Related to cistron: Polycistronic

cistron

 [sis´tron]
the smallest unit of genetic material that must be intact to function as a transmitter of genetic information; as traditionally construed, approximately synonymous with gene.

cis·tron

(sis'tron),
1. The smallest functional unit of heritability; a length of chromosomal DNA associated with a single biochemical function. Under classical concepts, a gene might consist of more than one cistron; in modern molecular biology, the cistron is essentially equivalent to the structural gene.
2. The genetic unit defined by the cis/trans test.
[cis tr-ans + -on]

cistron

(sĭs′trŏn′)
n.
A section of DNA that contains the genetic code for a single polypeptide and functions as a hereditary unit.

cis·tron′ic adj.

cis·tron

(sis'tron)
1. The smallest functional unit of heritability; a length of chromosomal DNA associated with a single biochemical function. In modern molecular biology, the cistron is essentially equivalent to the structural gene.
2. The genetic unit defined by the cis/trans test.
[cistr-ans + -on]

cistron

A short length of DNA that codes for a protein subunit (a polypeptide), together with adjacent sequences that control its expression. It is the smallest unit that transmits genetic information.

cistron

or

functional gene

a portion of DNA coding for one POLYPEPTIDE CHAIN or other gene product. The one gene/ one enzyme hypothesis thus becomes the ‘one cistron (gene)/one polypeptide’ hypothesis or ‘one gene/one functional product’ hypothesis.
References in periodicals archive ?
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
He posed the question of whether a gene was a "functional unit carrying the information necessary for the synthesis of a macromolecule" or "the unit of recombination." Textbooks of my college era discussed genes in terms of proposed models of cistrons, recons, and mutons; were missing the start codon in charts of the genetic code; and listed "nonsense" for what we know as stop codons (Keeton, 1967).
Distribution of nucleotide differences between two randomly chosen cistrons in a finite population.
En el cariotipo C1 los cistrones ribosomales mayores (rADN) se localizan en la posicion termi nal de los brazos cortos del primer par metacentrico, determinado por Ag-NOR y FISH con la sonda 18S rADN.
No cariotipo C1 os cistrons ribossomais maiores (rADN) se localizam na posicao terminal dos bracos curtos do primeiro par metacentrico, determinado por Ag-NOR e FISH com a sonda 18S rADN.
The ribosomal cistrons of 5S rDNA can only be identified using the FISH technique, and are therefore not related to NORs.
The concomitant use of 18S and 5S rDNA probes, using the FISH technique, showed the 18S ribosomal cistrons in a pair of subtelocentric chromosomes, on the long arm in the terminal position (Figure 1b) and the 5S sites were found in another subtelocentric pair, on the long arm in the interstitial region, near the centromere (Figure 1b).
It is a tribute to Michael White's scientific honesty and open mindthathe promptly started to test predictions of Hewitt's model by experimental hybridization between PI 69 andPI96, which produced 'syntheticvirgo', and by chromosome banding, DNA replication patterns, repeated sequences, and RNA ribosomal cistrons (White et al.
Each chromosome was designated by a series of scalars, termed Cistronic Stop Ratio Series (CSRS), representing the ratio of distributions of stop sequences in each on the 3 reading frames of all cistrons in a genome.
The Ribosomal RNA Cistrons. Chromosoma 85: 181-199.
This variation in the number of NOR-bearing chromosomes has been explained as a result of genetic activity regulation of the ribosomal cistrons (Cestari and Galetti, 1992).
On the constancy of the evolutionary rate of cistrons. Journal of Molecular Evolution 1:18-25.