Egg yolk sialylglycopeptide: purification, isolation and characterization of N -glycans from minor glycopeptide species.

Sialylglycopeptide (SGP) is a readily available naturally occurring glycopeptide obtained from hen egg yolk which is now commercially available. During SGP extraction, other minor glycopeptide species are identified, bearing N -glycan structures that might be of interest, such as asymmetrically branched and triantennary glycans. As the scale of SGP production increases, recovery of minor glycopeptides and their N -glycans can become more feasible. In this paper, we aim to provide structural characterization of the N -glycans derived from these minor glycopeptides.