because a culture substratum of type i collagen fibrils causes nmumg cells to accumulate heparan sulfate proteoglycan into a basal lamina-like layer , binding of heparan sulfate proteoglycans to type i collagen may lead to the formation of a basal lamina and may link the basal lamina to the connective tissue matrix , an association found in basement membranes .
C0085872
basal lamina
C0004799
basement membranes