Abstract
Solid-phase synthesis of glycopeptide generally requires the protection of both peptide side chains and hydroxyl groups of the carbohydrate portion. However, if the mild coupling conditions are used, the protection of the carbohydrate portion can be omitted. In this paper, we demonstrated it by the synthesis of Fmoc-serine carrying unmasked xylosyl glucose followed by the solid-phase synthesis of epidermal growth factor (EGF)-like domain of factor IX (45-87) using the unit. The product was well characterized by enzymatic digestion, amino acid analysis and mass spectrometry. The secondary structure of the product as well as glucosylated and non-glycosylated EGF-like domain was characterized by circular dichroism (CD) spectroscopy.
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