Fig. 3. Cell viability (A), DNA biosynthesis (B), collagen biosynthesis (C), total protein biosynthesis (D) and proline concentration (E), in untreated wild type MCF-7 and MCF-7 transfected cells with prolidase cDNA expression vector (MCF-7 ^PL). The mean values for 6 assays + S.D were calculated and submitted to statistical analysis using the ANOVA test, accepting P<0.001 as significant.