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Fig. 5. Linear regressions of mineral content on material properties in vertebral
cartilage from M. californicus. (A) Strength (MPa) increases
significantly as mineral content increases (R2=0.64;
P<0.001). (B) Stiffness (MPa) increases significantly with
increased mineral content (R2=0.36; P<0.001).
The red line is the regression line and the gray lines bounding it are the 95%
CI. These regressions include data from control vertebrae and those that were
demineralized in EDTA.