Figure 3: Agarose gel electrophoretic analysis of the RT-PCR showed the absence of the XPC cDNA amplification for XP50NEF and XP45GB patients compared to healthy control. The cDNA of the GAPDH gene was successfully amplified for all individuals. The variability of intensity of amplification between XP45GA patient and control is due to the quality of conservation of the blood sample. (M: 1 kb DNA ladder molecular size marker (GeneRuler)).