i.e. , heparan sulfate pg , the minor labeled component ( 15 % ) , remained pericellular while chondroitin sulfate ( cs ) pg , the predominately labeled pg ( 85 % ) , was associated with collagen fibrils as `` '' trails '' '' of 50-60-nm particles when viewed by scanning electron microscopy .
C0062503
heparan sulfate pg
C0033692
pg