the movement of newly synthesized proteoglycans from inside the cells into the extracellular matrix and , finally , into the culture medium was examined by measuring the distribution of 35s-labeled proteoglycans in the medium , a 4 m guanidine hcl extract of the cell layer , and in the remaining residue for a number of chase times following a 5-min pulse with [ 35s ] sulfate .
C0015350
extracellular matrix
C0033692
proteoglycans