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Total collagen concentration (per unit protein) in osteoblasts in the presence of BMP-7 short peptides and BMP-7. Data are mean ± SEM (N=3). *p<0.05 compared to controls (no additives) at respective days, **p<0.05 compared to BMP-7 at respective days, and ***p<0.05 compared to the same samples at 7 days and 14 days.
