CC3 negatively affects induction of c-FOS expression by UV. A. Quantitative RT-PCR analysis of c-FOS and EGR1 expression in U373 clones. B. Western blot analysis of FOS expression in cells before and 2 hours after exposure to UV at 15 J/m2. The protein bands were quantified after scanning with the Kodak Imaging Station 2000R, and GAPDH levels were used to normalize the data.