switching media during later passages did not reverse the shape of the cells obtained in cmrl-1066 medium or that of the fibroblast-shaped cells in ham 's f-10 medium , suggesting either that the growth of a subpopulation was favoured early during cellular adaptation to primary culture or that there was a single cell population whose phenotype was determined early in culture and then no longer responded to medium factors .
C0016030
fibroblast
C0007634
cell