Fig. 5From: The assessment of xenogeneic bone immunotoxicity and risk management studyResidual DNA of xenogeneic biological bone was much lower than fresh bone. The residual DNA assay was performed to determine the DNA of xenogeneic bone per unit mass. a The standard curve was drawn with Lambda DNA (standard DNA) and fluorescence values, b the recovery curve was made based on pre- and post purification of Lambda DNA. And the residual DNA of xenogeneic bone per unit mass was calculated using standard curve and recovery curve (c). Statistical significance was determined as **p < 0.01 and *p < 0.05 compared with fresh boneBack to article page