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. Author manuscript; available in PMC: 2013 Apr 11.
Published in final edited form as: J Am Chem Soc. 2012 Mar 27;134(14):6316–6325. doi: 10.1021/ja212188r

Figure 2.

Figure 2

Representative RP-HPLC analysis of coupling reactions. Traces of three potential products in the coupling reaction with Fmoc-Ser(Ac3GalNAcα)-OH: Fmoc-Pro-Gly-Hex-OH (6) (starting material, black); Fmoc-d-Ser(Ac3GalNAcα)-Pro-Gly-Hex-OH (2b, non-natural epimer, red); Fmoc-l-Ser(Ac3GalNAcα)-Pro-Gly-Hex-OH (2a, desired product, blue); mixture of three components at a ratio of 1:2:4 (purple).