twenty-three colonic adenocarcinomas were studied by immunofluorescence with antisera against components of the basement membrane ( type iv collagen , laminin , and heparan sulfate-rich proteoglycan ) as well as antisera against antigens of the connective tissue ( type iii collagen , fibronectin , and hyaluronectin ) .
C0004799
basement membrane
C0009333
type iv collagen