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

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 new Double HELIX PoP uses Fujitsu technologies to run multiple 100 Gbps services that support the MAX dense wavelength division multiplexing regional footprint.
While Watson showed how life looks, it was the exceptional parent who showed how they look--how they look in the face of the infinite ways that the double helix might twist their lives around is what Exceptional Parenting is all about.
Their new home is a wide open space flooded with light and decorated with bright shocks of navigational flower wallpaper, an anamorphic projection of the Trial of Galileo and a carpet patterned with the DNA's double helix.
Reinforced with multi-layered rubber, polyester cord and a double helix wire for optimum support, the hose is available in a variety of sizes.
The complex geometry of the double helix twists and turns, generating a succession of oblique surfaces.
Offering readers an informative perspective on such issues as the "Perfect Circle of Sound" and how the Creator is using it to promote healing for the self in loving service; proof of a "Love frequency" and how to use it; evidence that DNA microscopically mirrors the double helix wave form of the cosmos; the "Miracle frequency" for manifesting matter, and so much more, Walk On Water knowledgeably compiles a complete and thorough explanation of the many phenomenal intricacies of life, and also addresses the profoundly simple meaning of life for optimal and active living.
Thirteen chapters cover the beginnings of genetics (Mendel to Hitler), the double helix, customizing DNA molecules, biotechnology, genetically modified agriculture, evolution, the genetics of human diseases and disorders, and finally the nature/nurture argument.
However, eukaryotic cells contain an additional level of information superimposed on the DNA double helix in the form of a complex nucleoprotein entity generically termed "chromatin.
This means the double helix "twister channels" spin the oil mist in tight spirals along their length to create turbulence and pressure that forces oil droplets against the channel walls and returns them to the crankcase.
Professor Crick shared the Nobel Prize in chemistry in 1962 for discovering the double helix shape of the DNA molecule, one of the crowning scientific achievements of the 20th century.
Franklin, specifically to counterbalance Watson's best-selling personal version of events, The Double Helix.
Life science is characterised by having at its core the most fundamental self-replicating structure - that of DNA, the double helix, nature's most wonderful molecule.