Glycosylation-dependent cell adhesion molecule-1 (GLYCAM1) is a proteoglycan ligand expressed on cells of the high endothelial venules in lymph nodes. It is able to bind to the receptor L-selectin during inflammation, acting as a homing beacon for leukocytes expressing the receptor to enter the site of inflammation.GLYCAM1 binds to L-selectin by presenting one or more O-linked carbohydrates to the lectin domain of the leukocyte cell surface selectin.Data suggests that GLYCAM1 is a hormone-regulated milk protein that is part of the milk mucin complex.