affinity chromatography of these proteoglycans on columns of either immobilized platelet factor 4 or immobilized plasma fibronectin revealed that most of the chondroitin sulphate proteoglycan and the heparan sulphate proteoglycan bound to platelet factor 4 but that only the heparan sulphate proteoglycan bound to fibronectin , providing a ready means of separating the two proteoglycan classes .
C0062503
heparan sulphate proteoglycan
C0033692
proteoglycan