function:Binds tightly to hydroxyapatite. Appears to form an integral part of the mineralized matrix. Probably important to cell-matrix interaction. Promotes Arg-Gly-Asp-dependent cell attachment.,miscellaneous:It is possible that the segments of clustered carboxyl groups mediate the strong binding to hydroxyapatite.,PTM:N-glycosylated; glycans consist of sialated and core-fucosylated bi-, tri- and tetraantennary chains.,PTM:O-glycosylated at eight sites; mucin-type glycans contain Gal, GlcNAc, GalNAc and terminal NeuAc.,PTM:Sulfated on either Tyr-313 or Tyr-314.,
Secreted.
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