0.5% Ca: diet in which the Ca source is the AIN-93G diet base;
2% Ca: diet in which additional CaCl2 was added to AIN-93G to achieve final Ca concentration of 2%;
CaOx: diet in which additional CaC2O4was added to AIN-93G to achieve final Ca concentration of 2%;
WT and cod5: diets in which either processed WT or cod5 Medicago was added to AIN-93G to achieve final Ca concentration of 2%. n = 10 for 0.5%, 2% Ca and CaOx group;
n = 20 for WT and cod5 group. The error bars represent standard error. a and b represent statistically significantly different groups. P value for T-test between a and b group is less than 0.02 except for WT vs. cod5 group (*: P = 0.06).
