keratinocytes grown in low [ ca2+ ] tissue culture media ( 0.05 mm ) for 6 days , functionally and phenotypically become undifferentiated and express increased quantities of il-1 alpha mrna , whereas cells grown in high [ ca2+ ] media ( 1.2 mm ) for 6 days become terminally differentiated and il-1 expression ceased .
C0007634
cells
C0007589
differentiated