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. Author manuscript; available in PMC: 2013 May 14.

Published in final edited form as: Angew Chem Int Ed Engl. 2012 Apr 13;51(20):4860–4863. doi: 10.1002/anie.201200596

Scheme 1 — a. Enzymatic transformations of 25 to 11 and 23 a) β1–3GlcNAcT, UDP-GlcNAc; b) GalT-GalE, UDP-Glc; c) rST3Gal-III, CMP-Neu5Ac; d) hST6Gal-I, CMP-Neu5Ac.

b. Enzymatic transformation of 28 to 5 and 17. See Scheme 1a for conditions.

Scheme 1 — a. Enzymatic transformations of 25 to 11 and 23 a) β1–3GlcNAcT, UDP-GlcNAc; b) GalT-GalE, UDP-Glc; c) rST3Gal-III, CMP-Neu5Ac; d) hST6Gal-I, CMP-Neu5Ac.

b. Enzymatic transformation of 28 to 5 and 17. See Scheme 1a for conditions.