analysis of the protein isolated from bone demonstrated the presence of sialic acid and , while amino-terminal sequence analysis and internal tryptic fragment sequence analysis of about 25 % of the protein revealed little similarity to the rat phosphoprotein osteopontin , a conserved nine-residue sequence spanning the arg-gly-asp cell-binding site of the rat protein osteopontin , was identified in the approximately 66-kda chicken protein .
C0031689
phosphoprotein
C0033684
protein