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relative gene expression of the endothelial markers pecam-1, ve-cadherin, nos3, tm and e-selectin of confluent haecs cultured on peg-scl2-2 and peg-collagen hydrogels. for each hydrogel type, n = 3-6 independent samples were analyzed. # significantly different from the 8 mg/ml peg-scl2-2 hydrogel, p < 0.05; $ significantly different from the 12 mg/ml peg-scl2-2 hydrogel, p < 0.05.
