because of the functional importance of heparan sulfate proteoglycans in the fibronectin-dependent cell-substratum adhesion processes of these cells , these proteoglycans were fractionated on affinity columns of octyl-sepharose or of the heparan sulfate-binding proteins platelet factor 4 or plasma fibronectin .
C0062503
heparan sulfate proteoglycans
C0033692
proteoglycans