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Dictionary » V » Variant

Variant

variant

Something which differs in form from another thing, though really the same; as, a variant from a type in natural history; a variant of a story or a word.

Origin: Cf. F. Variante. (biology) a group of organisms within a species that differ in trivial ways from similar groups; a new strain of microorganisms.


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cellular mechanisms that result in symptoms of cholera

... The gene encoding the cholera toxin is introduced into V. cholerae by horizontal gene transfer. Virulent strains of V. cholerae carry a variant of temperate bacteriophage called CTXf or CTXφ.

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by adithya528
Tue Dec 11, 2012 1:49 pm
 
Forum: Cell Biology
Topic: cellular mechanisms that result in symptoms of cholera
Replies: 4
Views: 1067

identifying 2 unknown bacterias

First one seems to be a non-motile variant of E. coli. Second one is either Streptococcus or Enterococcus. The test results you report for that bacteria are for tests designed to ID enterics. For this one you need to do hemolysis, bacitracin, ...

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by Cat
Sun Sep 09, 2012 8:00 pm
 
Forum: Microbiology
Topic: identifying 2 unknown bacterias
Replies: 1
Views: 1699

Re: Flaws of Life in a Tube

... never analyzed these even though this is his first experiment using hydrogen sulfide. In the new research, the team analyzed samples from another variant of the experiment performed in 1958 in which Miller used carbon dioxide and hydrogen sulfide gas in the mixture. It was "lost" for ...

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by Niklas
Fri Apr 13, 2012 8:44 pm
 
Forum: Evolution
Topic: Flaws of Life in a Tube
Replies: 41
Views: 28793

Theories - Origin of Life

... of other factors that would affect the strength of the selection pressure on this mutation. The theory of natural selection says that favorable variants will tend to increase in populations, but it does not say that every possible favorable variant must come into existence - that's the random ...

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by Luxorien
Sun Mar 11, 2012 6:13 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534428

Re: Theories - Origin of Life

... to stick out of the protein, which in turn causes the proteins to clump together. Individuals who are homozygous recessive for the disease-causing variant are quite ill; individuals who are heterozygous, however, rarely experience symptoms. They still make sickle-shaped cells, but those cells generally ...

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by Luxorien
Thu Mar 08, 2012 10:21 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534428
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