3S44:
reference: A Sialyltransferase Mutant with Decreased Donor Hydrolysis and Reduced Sialidase Activities for Directly Sialylating Lewis(x)., Sugiarto G, Lau K, Qu J, Li Y, Lim S, Mu S, Ames JB, Fisher AJ, Chen X, ACS Chem Biol. 2012 Jul 20;7(7):1232-40. Epub 2012 May 14. PMID: 22583967

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