dermal cells isolated from the back of 7-day chick embryos were cultured on homogeneous two-dimensional substrates consisting of one or two extracellular matrix components ( type i , iii or iv collagen , fibronectin and several glycosaminoglycans : hyaluronate , chondroitin-4 , chondroitin-6 , dermatan or heparan sulfate ) .
C0017973
glycosaminoglycans
C0008454
chondroitin