2 ) the transition of the basal cells towards the upper layers of the epithelium was found to occur earlier ( about 6 hrs after injury ) in the neighboring cells in contrast to the transition time ( 20 hrs after labelling of untreated cells . but there was no difference in the rate of transition between the neighbors and the untreated cells . 3 ) the turnover time of the lip epithelial cells , which was measured by the peak to peak time difference in labelling index between basal and granular layers , was about 2 days and became about half of the time ( 4 days ) for untreated cells .
C0596155
basal cells
C0014609
epithelium