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Hairpin is a common secondary structure in proteins. It is a special example of a turn, where the polypeptide chain changes its direction.
There are several types of hairpins. For example, if two beta sheets are involved in a hairpin and adjacent to the “blue part”, the hairpin is called a beta hairpin. Also, beta hairpins can be classified due to the number of residues contained in the “blue part”.
Based on Ten-Amino Acid Protein from Shinya Honda, Toshihiko Akiba , Yusuke S. Kato, Yoshito Sawada , Masakazu Sekijima , Miyuki Ishimura , Ayako Ooishi , Hideki Watanabe , Takayuki Odahara and Kazuaki Harata, J. Am. Chem. Soc., 2008, 130, pp 15327–15331 using the Yale Morph Server and Spartan08 Fixer to produce viable pdb files.
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