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Poppy genome reveals evolution of opiates The opium poppy has been a source of painkillers since Neolithic times. Attendant risks of addiction threaten many today. Guo et al. now deliver a draft of the opium poppy genome, which encompasses 2.72 gigabases assembled into 11 chromosomes and predicts more than 50,000 protein-coding genes. A particularly complex gene cluster contains many critical enzymes in the metabolic pathway that generates the alkaloid drugs noscapine and morphinan. Science , this issue p. 343
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Guo et al. (2018) studied this question.
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