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Cationic polycyclization cascades: The stereoselective transformations of linear polyolefins to give cyclic triterpenes (see scheme) have fueled half a century of intense research. Structures of triterpene cyclases complexed with the substrate analogue 2-azasqualene and the reaction product lanosterol provide new insights into the elegant mechanisms of these enyzmes.
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K. Ulrich Wendt (2005) studied this question.
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