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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Synonym(s): DNA helix, double helix, twin helix
[James Dewey Watson, Francis H. C. Crick]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

double helix

see DNA.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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
Medical Eponyms © Farlex 2012
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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.
Adenosine monophosphate confirms 'other double helix' theory
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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.
More cash for research; You Say Email:letters@liverpoolecho.co.uk
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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.
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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.
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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.
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Dampening System[TM]; STS Shock Terminator Suppressor[TM]; carbon cable guard rod w/Teflon slide; and Double Helix Elite[TM] string.
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