User:Robert Dutnall/Sandbox 1 alpha helix
From Proteopedia
SECONDARY STRUCTURES OF PROTEINS 1: HELICES
A polypeptides secondary structure is defined by the local conformation of its main chain. There are two major types of regular polypeptide main chain conformation: helices and sheets. There are also regular turn structures that often connect elements of secondary structure.
Helices
Helices are the most striking elements of secondary structure.
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