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A helix

A helix

The helical (commonly right-handed) form present in many proteins, deduced by Pauling and Corey from x-ray diffraction studies of proteins such as alpha-keratin; the helix is stabilised by hydrogen bonds between, e.g., ==C==O and HN== groups (symbolised by the centre dot in ==CO-HN==) of different eupeptide bonds. In a true a helix, there are 3.6 amino acid residues per turn of the helix.

Synonym: 3.613 helix, Pauling-Corey helix.

collagen helix, an extended left-handed helix resulting from the high levels of glycine, l-proline, and l-hydroxyproline present in the collagens. There are 3.3 amino acids per turn of the helix. Three of those left-handed helices form a triple superhelix that is right-handed.

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Protein structure

Hi guys, I know that Protein structure related to their function. Certain protein usually have alpha helix is more prominent but certain protein have beta structure more prominent. My question is which amino acid is favourable to form alpha helix and beta structure? What ...

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by kanagasundar
Sat Sep 14, 2013 2:40 am
Forum: Cell Biology
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DNA helix and gene

Do the two strands of DNA helix carry the same genetic information?

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Questions on the Sodium Potassium Pump and Enzymes

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by JoWillyTso
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by JordanGo
Fri Oct 19, 2012 8:16 pm
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Help - Why can't DNA be parallel?

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by keetner
Sun Sep 30, 2012 6:18 pm
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