moreover , these studies extend the conclusion ( weber , h. , engel , j. , wiedemann , h. , glanville , r. , and timpl , r. ( 1984 ) eur . j. biochem . 139 , 401-410 ) about a tumor basement membrane , to an authentic physiological membrane , that the globular domain is a major cross-linking site in the type iv collagen matrix .
C0004799
basement membrane
C0009333
type iv collagen