proteoglycan research on cells that participate in immune responses has progressed from the early novel finding that heparin proteoglycans are present in the secretory granules of the connective tissue mast cell to the more recent findings that mucosal mast cells and natural killer ( nk ) cells possess chondroitin sulphate proteoglycans in their granules .
C0033692
proteoglycan
C0033689
chondroitin sulphate proteoglycans