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 ?
With the DNA inside the instrument, the team measured how the frequency of sound waves running along the double helix structure changed with their wavelength.
Francis Crick, co-discoverer of the double helix structure of DNA, argued that the code may have been a "frozen accident," becoming so deeply embedded in the core machinery of life at some point in the distant past that any further change became impossible, notes Hayes, a senior writer for American Scientist.
These researchers discovered the ladder-like double helix structure of DNA, helping to start the biotechnology revolution now underway.
On April 25, 1953, they published their paper in the science journal Nature and their theory of the double helix structure of DNA was unleashed on the world.
biologist James Watson and his collaborator Francis Crick discovered the double helix structure of DNA.
Mint chief executive Gerald Sheehan said: ``The work of Prof Sampson underlines the importance of the double helix structure of DNA.
The survey results were release to coincide with the anniversary of James Watson and Francis Crick's discovery of the double helix structure of DNA.
The Nobel Prize-winning Watson, of course, is the co-discoverer of DNA's double helix structure, which marks the beginning of the genetic revolution.
Genes are made up of complementary base pairs that combine to form the double helix structure of deoxyribonucleic acid (DNA).
Crick, then at Cambridge University, discovered the double helix structure of DNA and showed that its chemistry served as the alphabet and the language of heredity.
He described the nature of the chemical bond, leading to the discovery of the double helix structure of DNA.
Our results will move Europe into a central position in the new field of RNA epigenetics, which has the potential to become the next big wave in science 63 years after the discovery of the double helix structure.