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Secondary and tertiary structure. To the left, the beta-pleated sheets are shown (the blue arrows indicate the orientation), the alpha-helix portions are labelled red. The figure to the right is a so-called 'space-fill' representation. It depicts the molecular surface at atomic resolution but gives no details of the molecule's interior. Exposed amino acid residues are coloured. The figures stem from the
Image Library of Biological Macromolecules (IMB Jena)
