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A tearing injury to muscle. Usually causes some degree of bleeding within the muscle tissue (haematoma).
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cell strain
A population of cultured cells, of plant or animal origin, that has a finite life span, in contrast to a cell line. (Figure 6-5) ...

An organism that is different from other organisms of the same species due to genetic differences.

Strains and media
E. coli K12 strain DL41 ("-, metA28)[38] was obtained from the E. coli Genetic Stock Center, CGSC# 7177. Plasmid pCS16 (SC101 ori, a luxCDABE operon and a KanR marker) was obtained from M. Surette.

Strain Refers to a group of mice that are bred within a closed colony in order to maintain certain defining characteristics. Strains can be inbred or non-inbred (see Chapter 3).
See Inbred Strain in the MGI Glossary.

F- strain: E.coli strain behaving as recipients during conjugation (female). It lacks the F factor.

If a strain of resistant bacteria shows up in a community, let's say it shows up in a school. What should the public health people be doing to control it?

[edit] Strains
Model of successive binary fission in E. coli
A strain of E. coli is a sub-group within the species that has unique characteristics that distinguish it from other E. coli strains.

Strains of HIV (designated "R5") bind the coreceptor CCR5. These are the strains that are most infectious.
Strains of HIV (designated "X4") bind the coreceptor CXCR4.

Pure culture of microorganisms composed of the descendants of a single cell.
Related Terms:
The subsequent generation following a mating or crossing of parents; offspring.

Two strains of Drosophila paulistorum developed hybrid sterility of male offspring between 1958 and 1963. Artificial selection induced strong intra-strain mating preferences.

Flu strains are named after their types of hemagglutinin and neuraminidase surface proteins , so they will be called, for example, H3N2 for type-3 hemagglutinin and type-2 neuraminidase.

Host strain (bacterial): The bacterium used to harbor a plasmid. Typical host strains include HB101 (general purpose E. coli strain), DH5a (ditto), JM101 and JM109 (suitable for growing M13 phages), XL1-Blue (general-purpose, ...

form; strain; var.; variant ((biology) a group of organisms within a species that differ in trivial ways from similar groups) ...

Inbred strains have identical or nearly identical genetic information across individuals.

Vaccine strain derived from SAD by escape mutant monoclonal antibody techniques (Street Alabama Gif) ...

The two strains differed in the nature of the colonies they formed; in one case the colonies were smooth, in the other case, the colonies were rough.

A mutant strain of microorganism that will proliferate only when the medium is supplemented with some specific substance not required by wild-type organisms.

coli strain is F lac Z met bio. Cells from this strain are mixed with an E. coli strain that is lac Z met bio and carrying an F' episome with the plac O lac Z DNA sequence on the episome, and cultured for several hours.

congenic strains /kən-JEN-ik/ Nearly identical strains differing only with respect to a small chromosomal segment. Compare: coisogenic strains.

a homozygous strain produced by inbreeding
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row

This places a strain on the heart as the heart muscle receives less oxygen and carbon monoxide can damage directly, the linings of arteries.
Nicotine ...

1. The dead S strain had been reanimated/resurrected.
2. The Live R had been transformed into Live S by some "transforming factor".
Further experiments led Griffith to conclude that number 2 was correct.

biotype. A strain of a species that has certain biological characters separating it from other individuals of that species.
blackarm. Bacterial blight lesions on stems.

Nearly identical strains of an organism; they vary at only a single locus.
Comparative genomics
The study of human genetics by comparisons with model organisms such as mice, the fruit fly, and the bacterium E. coli.

Assembler Tool: A program to assemble sequences belonging to one locus from an isolate or strain, and compare them to reference sequence(s)
BALIBASE - A benchmark alignment database: BAliBASE 2.

A cross between an animal that is heterozygous for alleles obtained from two parental strains and a second animal from one of those parental strains. Also used to describe the breeding protocol of an outcross followed by a backcross.

Examples include transgenic models where specific genetic loci are either knocked-out (removed) or knocked-in (introduced) to enable study of the locus; recombinant inbred mouse strains; recombinant viral transfection for synthesis of clonal protein.

Auxotrophic mutantA bacterial strain which has a mutation in at least one of the enzymes in a biochemical pathway responsible for synthesising an essential substance, for example an amino acid.

A biotechnology company introduces a new strain of tomato plant that produces a natural pesticide, making it resistant to the beetle.

Several cyanobacterial strains are also capable of diazotrophic growth. Genome sequencing has provided a large amount of information on the genetic basis of nitrogen metabolism and its control in different cyanobacteria.

Mutations in the antigenic structure of the influenza virus have resulted in a number of different influenza subtypes and strains.

Vaccines therefore may consist of just the viral protein coat (some flu vaccines), or they may be heat-killed viruses (the Salk polio vaccine) which can no longer replicate or a vaccine may be an "attenuated" live virus strain (Sabin polio vaccine).

See also: See also: Trans, Organ, Biology, Cells, Human

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