degradation of cell-associated proteoheparan sulfate by trypsin followed by papain or alkali suggest that the core protein consists of three types of regions , heparan sulfate-containing regions of mr = 140,000 , oligosaccharide-containing regions , and nonglycosylated peptide regions containing most of the [ 3h ] leucine .
C0062503
proteoheparan sulfate
C0019143
heparan sulfate