3SDT:
reference: Structure of a three-domain sesquiterpene synthase: a prospective target for advanced biofuels production., McAndrew RP, Peralta-Yahya PP, DeGiovanni A, Pereira JH, Hadi MZ, Keasling JD, Adams PD, Structure. 2011 Dec 7;19(12):1876-84. PMID: 22153510

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