Figure 6. PCR products containing the RPGRIP1 insertion were sized by capillary electrophoresis in the MLHD and the Beagle. Fragment sizing, by capillary electrophoresis of PCR products containing the RPGRIP1 insertion in a MLHD (A, RPGRIP1^+/−) and two Beagles (B, RPGRIP1^+/−L; C, RPGRIP1^−L/−L). The 73 bp single blue peak corresponds to the wildtype allele (+), while the blue peaks centered on 114 bp and 128 bp represent the alleles with the insertion (- and -L); these two insertion alleles differ only in the number of adenines in the homopolymeric sequence. The red peaks correspond to the size standard.