Figure 4.
The relative expression levels of BMP4 in craniofacial bones. (A) The relative expression levels of BMP4 in mandible, premaxilla, lacrimal, frontal, and parietal bones. (B) The relative expression levels of BMP4 in nasal, turbinate, and occipital bones. * p < 0.05, ** p < 0.01 among the groups.