Tyrosine sulfation of P-selectin glycoprotein ligand-1 is required for high affinity binding to P-selectin.
Wilkins, Moore, McEver, and Cummings. 1995. “Tyrosine Sulfation of P-Selectin Glycoprotein Ligand-1 Is Required for High Affinity Binding to P-Selectin.”. J Biol Chem 270 (39): 22677-80.