Conformation ascorbate oxidase

There are six a-helices in the monomer of ascorbate oxidase, involving a total of 37 residues or 6.7% of the polypeptide. In addition there are one longer and three short 3jo helices. The average conformation angles of these secondary structures for subunit A and B have been calculated and are for both a-helices and 3io helices close to those reported by Barlow and Thornton 89). Exceptions are Og and ag, which have one i i + 5 bond at their C-terminal end to give a short length 7T-helix. 

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