Fig. (2) Expressions of 14 RA-up-regulated genes. Ordinate, relative expression level; abscissa, days after Ca9-22 cells were seeded with (red line) or without (blue line) 9-cis RA. See Results for explanations of gene types ‘A’, ‘B’ and ‘C.’ The expression of each gene was examined, at least, twice; representative results are demonstrated.