Fig. 2From: Maintenance of human chondrogenic phenotype on a dendrimer-immobilized surface for an application of cell sheet engineeringQuantitative RT-PCR analysis of collagen type II, aggrecan and collagen type I expressions in human chondrocytes cultured on G5 (open bar) and PS (closed bar) surfaces. Data represent average values with the standard deviation determined from three independent experiments and considered significant at *p < 0.05 and **p < 0.01Back to article page