A) Representative images of calcein double labeling in distal femur trabecular bone of WT and RadKO mice (10X). B) Mineral apposition rate (MAR), mineralizing surface (MS/BS), and bone formation rate (BFR/BS) in the cortical bone (periosteal surface) and trabecular bone of WT and RadKO mice. N=5 mice per genotype, female, 4 months of age * p<0.05, ** p<0.01 compared to WT by Student’s t test.