Figure 3.
Short timecourse of PR expression in mES cells upon differentiation induction. RNA was prepared from cells cultured as described in Materials and Methods and RT-PCR performed using primers and conditions listed in Table I. Samples from mES cells maintained in the undifferentiated state by addition of LIF to the culture media are labeled Undif (+LIF). Differentiation was induced by either LIF withdrawal, addition of RA, or both for the times indicated in plated cells. The expression of a series of mES cell differentiation markers is also shown. GAPDH is used as a normalization control.