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Figure 6. Structures of the pyridylaminated-oligosaccharides liberated from the 32-kDa enamelin by glycopeptidase F digestion (Yamakoshi, 1995). Asn245 uses all five of the biantennary types shown on the right. Asn252 uses the top two biantennary types. Asn264 uses the three triantennary types shown on the left (Yamakoshi et al., 1998). Key: fucose, F; galactose, G; N-acetylglucosamine, GN; mannose, M; N-acetylneuraminic acid, S. Diagram showing the position of the 32-kDa enamelin cleavage product in the 186-kDa secreted enamelin protein and the positions of the two phosphorylations (P) and glycosylations (Gly).
