Double-Helix

For James Watson's book see The Double Helix.

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In geometry a double helix (plural helices) typically consists of two congruent helices with the same axis, differing by a translation along the axis, which may or may not be half-way.

Related Topics:
Geometry - Helices

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The double helix is the structure of DNA as first published by James Watson and Francis Crick in 1953. They constructed a molecular model of DNA in which there were two complementary, antiparallel (side-by-side in opposite directions) strands of the bases guanine, adenine, thymine, and cytosine, covalently linked through phosphodiester bonds. Each strand forms a helix, and the two helices are held together through hydrogen bonds, ionic forces, hydrophobic interactions, and van der Waals forces forming a double helix.

Related Topics:
DNA - James Watson - Francis Crick - Antiparallel - Guanine - Adenine - Thymine - Cytosine - Covalently - Phosphodiester bonds - Hydrogen bonds - Hydrophobic - Van der Waals forces

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