PAX2 and glomerular disorder: However, in experimental glomerular disease, PEC number was higher than baseline, and SM22α -/- mice had a higher number of PECs compared to SM22α +/+ mice at day 7 (20.33 ± 0.70 vs. 26.38 ± 0.73 PAX2+ cells/Bowman’s capsule length in mm, P <0.01), and at day 14 (23.92 ± 1.14 vs. 38.55 ± 1.18; P <0.01) (Figure 1B).