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Effect of Rspo2 on the differentiation of hDPSCs. The expression of odontoblast-specific mRNA and protein in response to the exogenous rhRspo2 was assessed by qRT-PCR (A) and immunofluorescence staining (B–E). *p < 0.05, **p < 0.01, and ***P < 0.001 compared with the control group.
