3BUB:
reference: Probing the Substrate Specificity of Golgi alpha-Mannosidase II by Use of Synthetic Oligosaccharides and a Catalytic Nucleophile Mutant., Zhong W, Kuntz DA, Ember B, Singh H, Moremen KW, Rose DR, Boons GJ, J Am Chem Soc. 2008 Jun 18;. PMID: 18558690

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