Cover illustration
April 15, 2008; 105 (15)
Cover image: 3,5-dimethoxytoluene (DMT) is the essence of the tea-like scent of modern hybrid roses. The final steps in DMT synthesis are carried out by two enzymes that differ at the active site in only one amino acid. Native European roses lack the second enzyme and the tea scent. In their article on pages 5927–5932, Scalliet et al. show that the second enzyme likely originated by gene duplication in Chinese roses. Image courtesy of Philippe Hugueney.
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