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Protein alpha helix structure, diagram
Protein alpha helix structure, diagram. The alpha helix is one of the secondary structures of proteins (along with beta sheets). The alpha helix is sometimes called the Pauling-Corey-Branson alpha helix after Linus Pauling, Robert Corey, and Herman Branson, who published details of this structure in 1951. The alpha helix is a repeated protein structural element. This view shows the hydrogen bonds (dotted lines) between the carboxyl (C=O) and amine (NH) groups. The atoms in this molecular model are colour-coded: carbon (brown), oxygen (red), nitrogen (light blue), and hydrogen (purple). The helical coil distance is labelled as 5.4 angstroms.
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