A significant difference was detected between the control and
exposed group in the number of signals for major ribosomal genes
(Mann–Whitney U, p < 0.001, Fig 2b). The signal mode was 2 in
both groups. However, a data distribution assessment showed the
number of classes corresponding to the different signal numbers to
increase in the group exposed to hydrogen peroxide. Interestingly,
the percentage of cells displaying 1 and 2 signals was significantly
lower (Fig 4).