although the f3 cells ( a mutant line derived from b2 and reported to lack a cell surface heparan sulfate proteoglycan ) do not contain a large molecular size heparan sulfate proteoglycan species , there was no significant difference between the b2 and f3 cells in the percentage of total heparan sulfate released by mild trypsinization , and both the b2 and f3 cells synthesized cell-associated and secreted chondroitin sulfate and heparan sulfate proteoglycans having properties very similar to those of the original pc12 cell line but with a reversed ratio ( 35:65 ) of chondroitin sulfate to heparan sulfate .
C0699040
cell surface
C0007634
cell