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Els.100 Martha, P. Kitamura Y, Yamamoto S, Galli SJ and Greaves MW (eds) (1995) Biological and Molecular Aspects of Mast Cells and Basophil Differentiation and Function. Proceedings of the National Academy of Sciences of the USA 89 52815285. Torsion angles are given positive and negative values by the position of the first and lastatoms(AandD)relativetothebondangleifthe smallest movement for the front atom to eclipse the back atom is in a clockwise direction it is given a positive value, and if it is anticlockwise it is given a negative value.
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