Fig. 4From: The Characteristics Of Human Bone-Derived Cells (HBDCS) during osteogenesis in vitroThe total protein content (a), collagen assay (b) and alkaline phosphatase (ALP) activity (c). The results of the collagen assay are presented as the absorbance level. The results from seven separate experiments are shown. The data are presented as means ± standard deviation. Student’s t-test was used for statistical analyses. *p < 0.05 (considered significant)Back to article page