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Reactions comprising the shikimate/quinate cycle. The shikimate pathway (indicated by block arrows) proceeds from 3-dehydroquinate via 3-dehydroshikimate to shikimate; the bi-functional enzyme DQD/SDH catalyzes these two reactions. Quinate can be synthesized from either 3-dehydroquinate or from shikimate; these two reactions are catalyzed by QDH and QD, respectively.
