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This results of the following flow cytometry detection showed that the mesenchymal stem cell surface markers CD14, CD29, CD90 and CD146 were highly expressed, while the hemopoietic stem cell surface marker CD45 was little expressed in the cells of the four tooth development stages. p75NTR was lowly expressed at E12.5 d, but significantly increased at E13.5 d and stably expressed at a high level during the 13.5 d‐18.5 d
