interpretation of the gold particle densities was based on ( a ) the similarity between the ultrastructure of most thick basement membranes and of the lamina densa of most thin basement membranes , and ( b ) the biochemical content of the three substances under study in the ehs tumor matrix ( eur j biochem 143:145 , 1984 ) .
C0085872
lamina densa
C0004799
basement membranes