Alteration of histone acetylation pattern during long-term serum-free culture conditions of human fetal placental mesenchymal stem cells.

As expected, mean telomere length in fPMSCs at later passages (P8, P11 and P13) was marginally reduced relative to cells harvested at an earlier passages (P3 or P5); however, the difference did not reach statistical significance ( Fig. 8 ).

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