2X6Q:
reference: Structural Insights on the New Mechanism of Trehalose Synthesis by Trehalose Synthase TreT from Pyrococcus horikoshii., Woo EJ, Ryu SI, Song HN, Jung TY, Yeon SM, Lee HA, Park BC, Park KH, Lee SB, J Mol Biol. 2010 Oct 1. PMID: 20888836

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