4ZLU:
reference: Producing glucose-6-phosphate from cellulosic biomass: structural insights into levoglucosan bioconversion., Bacik JP, Klesmith JR, Whitehead TA, Jarboe LR, Unkefer CJ, Mark BL, Michalczyk R, J Biol Chem. 2015 Sep 9. pii: jbc.M115.674614. PMID: 26354439

This OCA Structure page
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