Figure 4From: Osteoblastic differentiation and stress response of human mesenchymal stem cells exposed to alternating current electric fields Heat Shock mRNA Expression. (a) Hsp27 mRNA expression relative to GAPDH vs. time. (b) Hsp70 mRNA expression relative to GAPDH vs. time. Statistical significance between groups is marked by an asterisk (p < 0.05).Back to article page