double helix

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Related to Double helix structure: B form DNA

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

helix

1. a coiled structure.
2. the free margin of the pinna of the ear.

α-helix, alpha-helix
the folding arrangement of parts of protein molecules in which a single polypeptide chain forms a right-handed helix.
helix destabilizing proteins
proteins that bind in a cooperative manner to DNA single-strands during DNA replication and help open up the replication fork. Called also single-strand DNA binding proteins.
double helix
the native state of deoxyribonucleic acid (DNA), in which two antiparallel chains with complementary nucleotide sequences are wound around each other. The DNA molecule consists of two sugar-phosphate strands with the nucleotide base pairs stacked between them. The orientation of the two strands is antiparallel, i.e. 5′→3′ directions are opposite. Called also Watson-Crick helix.
References in periodicals archive ?
The double helix structure has been shown to readily unwind and unzip in response to tension inside the cell because its inbuilt structural stiffness prevents the double-strand DNA molecule from extending.
He described the nature of the chemical bond, leading to the discovery of the double helix structure of DNA.
Watson and Francis Crick identified the double helix structure of DNA, announcing, "We have found the secret of life.
Meanwhile, the poll that voted Hawking's bestseller as the most likely to be remembered in 150 years' time also named James Watson and Francis Crick, who proposed the double helix structure of DNA, as the scientists whose name would be best remembered in 200 years' time.
The double helix structure of DNA was discovered by James Watson and Francis Crick, now patrons of Newcastle's Centre for Life, in 1953.
Millions of a special pounds 2 piece, featuring a picture of the double helix structure of two strands twisted around each other, were going into circulation.
Millions of a special issue pounds 2 piece, which features a picture of the double helix structure of two strands twisted around each other, are going into circulation.
The third, the pounds 2 piece, celebrates the discovery of the double helix structure of DNA 50 years ago by Francis Crick and James Watson.
Then came four years as an independent investigator at Long Island's Cold Spring Harbor Laboratory, which is run by Nobelist James Watson, one of the co-discoverers of the double helix structure of DNA.
today announced its Grand Opening, which coincides with National DNA Day, the anniversary of the publication of the DNA double helix structure in April 1953.
Researchers have made the first precise measurements of DNA's ability to conduct electricity laterally, across its double helix structure.
Watson, an American, discovered the double helix structure of DNA with the Englishman Francis Crick, advancing our understanding of genetics.