the effect of hydrocortisone on the development of dorsal skin was analyzed in the chick embryo by ( 1 ) transmission electron microscopy , ( 2 ) indirect immunofluorescence histology of extracellular matrix components ( collagen types i , iii , and iv ; fibronectin ; and laminin ) , and ( 3 ) quantitative determination of collagen content and proline incorporation , between administration of the drug at 6 or 6.5 days and final retrieval of skin pieces at 11 days of incubation .
C0041455
collagen types
C0009325
collagen