S figure 2

Supplementary Fig. S2. Relative mRNA levels. A: Relative mRNA levels of miRNAs with extremely low expression in ATDC5 cells, chondrocytes, hypertrophic chondrocytes. B: Relative mRNA levels of let-7a-5p in osteoclasts and exosomes. The data in the figures represent the average, n = 3/group. Significant differences are indicated as **P < 0.01 using Student’s t test.