Figure 2From: Lack of anabolic response to skeletal loading in mice with targeted disruption of the pleiotrophin geneExpression levels of PTN gene as a function of age. The y-axis represents fold increase in the PTN gene in response to 12 days of four-point bending on tibia and the x-axis represents varying age groups of female B6 mice. Values are mentioned as mean ± SD. ap < 0.05 vs. non-loaded bones, N = 5.Back to article page