Figure 5

Differentiation of F9 EC cells into PE is accompanied by specific changes in regulators of TFIIIB activity. a Western blot of whole cell extract (20 μg) of undifferentiated (EC) and differentiated (PE) F9 cells using antibodies against RB, p107, p130 and TFIIB, as indicated. b Western blot of whole cell extract (20 μg) of undifferentiated (EC) and differentiated (PE) F9 cells using antibodies against c-Myc, Max, TFIIB and actin, as indicated. c Western blot of whole cell extract (20 μg) of undifferentiated (EC) and differentiated (PE) F9 cells using antibodies against total Erk and active (phosphorylated) Erk, as well as TFIIB, as indicated.