Porcine DGP is the middle part of DSPP and extends from Ser392 and extends to Gly472. The bar maps PTMs in the DGP region, which has been entirely sequenced by protein methods. Although predicted, Asn394 is not glycosylated, but Asn 397 is glycosylated (green square) and four serines (Ser453, Ser455, Ser457 and Ser462) are phosphorylated (red squares). Biantennary glycan structures released from Asn397 were fluorescently labeled and characterized, and the five determined structures are shown.