Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40643-022-00513-7/MediaObjects/40643_2022_513_Fig2_HTML.png)
a The HUMSCs were cultured for 7 days for ALP staining, and the HUMSCs were cultured for 14 days for Alizarin red staining (scale bar: 100 μM). b Quantitative analysis of ALP activity in the HUMSCs cultured for 7 days. c Calcium contents in the HUMSCs cultured for 14 days. d The quantitative evaluation of osteogenic-related genes in the HUMSCs