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. Author manuscript; available in PMC: 2010 Dec 30.
Published in final edited form as: J Am Chem Soc. 2009 Dec 30;131(51):18467–18477. doi: 10.1021/ja907750r

Figure 4.

Figure 4

Synthesis of disialyl GD3 oligosaccharides Neu5Acα2–8Siaα2–3GalβOR containing a terminal α2–8-linked Neu5Ac and different penultimate α2–3-linked sialic acid forms. Reagents and conditions: (i) Pyruvate, CTP, Mg2+, Tris-HCl buffer (pH 8.5), E. coli K12 sialic acid aldolase, NmCSS, and CstIIΔ32I53S. aDetermined by small-scale reaction using TLC analysis.