The expression of the FHIT gene in F6 cells and FMSCs. The mRNA levels of FHIT were determined by reverse transcription polymerase chain reaction. Marker, DL2000; lane 1, FMSCs; lane 2, F6 cells, lane 3, blank. FHIT, fragile histidine triad; FMSCs, fetal mesenchymal stem cells.