FIG. 5.

Photomicrographs of T-antigen mutants cultured in the absence of EGF. (A) SFME cells growing in complete serum-free medium; (B) SFME T Ag cells growing for 28 h in serum-free medium that lacks EGF; (C) SFME-N136 cells growing for 29 h in serum-free medium that lacks EGF; (D) SFME cells that were mock transfected with carrier DNA cultured for 8 h in serum-free medium that lacks EGF; (E) SFME-1135 cells cultured for 10 h in serum-free medium that lacks EGF; (F) SFME-3213 cells cultured for 8 h in serum-free medium that lacks EGF; (G) SFME-5110 cells cultured for 9 h in serum-free medium that lacks EGF.