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. Author manuscript; available in PMC: 2014 Aug 15.
Published in final edited form as: Bioorg Med Chem. 2013 Mar 7;21(16):4778–4785. doi: 10.1016/j.bmc.2013.02.040

Scheme 2.

Scheme 2

Strategies for optimizing synthetic yields of the one-pot multienzyme (OPME) sialylation reactions by adding excess amount of CTP and removal of CMP byproduct by flash C18 cartridge purification (OPME synthesis of STn-MUC glycopeptide is used as an example).