double helix


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helix

 [he´liks] (pl. he´lices, helixes) (Gr.)
1. a winding structure; see also coil and spiral.
2. the superior and posterior free margin of the pinna of the ear.
α-helix (alpha helix) the complex structural arrangement of parts of protein molecules in which a single polypeptide chain forms a right-handed helix.
double helix (Watson-Crick helix) the structure of deoxyribonucleic acid (DNA), consisting of two coiled chains, each of which contains information completely specifying the other chain.

Wat·son-Crick he·lix

(waht'sŏn crik),
the helical structure assumed by two strands of deoxyribonucleic acid, held together throughout their length by hydrogen bonds between bases on opposite strands, referred to as Watson-Crick base pairing. See: base pair.
[James Dewey Watson, Francis H. C. Crick]

double helix

n.
The coiled structure of double-stranded DNA in which strands linked by hydrogen bonds form a spiral configuration, with the two strands oriented in opposite directions.

double helix

A structural motif of nucleic acids in which 2 complementary chains of DNA and/or RNA spiral around each other as paired nucleobases attached to a deoxyribose phosphate backbone

Wat·son-Crick he·lix

(waht'sŏn-krik' hē'liks)
The helical structure assumed by two strands of deoxyribonucleic acid, held together throughout their length by hydrogen bonds between bases on opposite strands, referred to as Watson-Crick base pairing.
See also: base pair
Synonym(s): DNA helix, double helix.
[James Dewey Watson, Francis H. C. Crick]

double helix

see DNA.

Watson,

James Dewey, U.S. geneticist and Nobel laureate, 1928–.
Watson-Crick helix - the helical structure assumed by two strands of deoxyribonucleic acid. Synonym(s): DNA helix; double helix; twin helix
References in periodicals archive ?
Caption: Short chains of adenosine monophosphate (AMP) --a nucleotide base for both DNA and RNA --can form the double helix shown above (the grey spheres represent ammonium ions.) Unlike DNA, the strands of this helix are parallel and formed of A-A base pairs.
Set up in 1995, Double Helix provides its services to the pharmaceutical and medical device sectors.
In 25 years, the Double Helix Science Club has inspired hundreds of thousands of Australian kids who are passionate about science Maybe one day you'll find a job in science.
Watson has hinted more than once that he exaggerated personalities and situations in The Double Helix for intentional, novelistic effect.
Not since Watson and Crick discovered the double helix structure of DNA molecules has there been a giant step forward in cancer research such as this.
Feature a double helix Polypropylene color hub and a rigid Teflon crimped lining that projects approximately 1/8" from the inside of a stainless steel tube.
The sculpture, called DNA DL90, represents a DNA double helix made from old trollies.
The group's coordinator was Thomas Smith of Double Helix Inc, who was reported as criticising the ABN board and seeking a change in its composition.
A Konami presentation of a game developed by Double Helix for the PlayStation 3 and Xbox 360.
Stent, who wrote Molecular Biology of Bacterial Viruses, a textbook for the study of molecular genetics following the finding of the double helix, served as chair of the department of molecular biology at Berkeley from 1980 to 1986.
Like natural DNA, the new molecule can form a triple helix as well as a double helix. Preliminary tests show that the DNA-like variant has some ability to pair up with natural DNA to form a hybrid double helix, but this work is still ongoing, Inouye says.
Dampening System[TM]; STS Shock Terminator Suppressor[TM]; carbon cable guard rod w/Teflon slide; and Double Helix Elite[TM] string.