Apoptosis was assessed in whole kidney lysates using the Caspase-Glo 3/7 luminescence assay (Promega) measuring levels of active-caspase 3/7, as previously described(29 (link)). Luminescence was measured using a Turner Biosystems luminometer (Promega). Experiments were performed in 10 independent kidney samples each, from RCALC2 mutant mice and WT littermates. Data was expressed as fold change±SEM for each group. Statistical analyses were performed using two-way ANOVA.