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Expression of neurocan, NG2, and versican by astrocytes grown in hydrogels. Expressed as fold change compared with gene expression by astrocytes in fibrin hydrogel containing aprotinin. Each target gene is normalized to GAPDH. CG = collagen hydrogel; CPG = crosslinked collagen hydrogel; FA = fibrin hydrogel containing aprotinin; FAFn = fibrin hydrogel containing aprotinin and fibronectin.
