Expression of phospho-RyR2 and Ryr2 mRNA levels in retinas of Nrl−/−, Cnga3−/−/Nrl−/−, and Cnga3−/−/Nrl−/−/Gucy2e−/− mice at P15, P30, and P60 were analyzed by immunoblotting and qRT-PCR. (A) Increased phospho-RyR2 level in Cnga3−/−/Nrl−/− retinas and deletion of retGC1 suppressed the upregulation. Shown are representative immunoblotting images of phospho-RyR2 and corresponding quantitative analysis. (B) qRT-PCR results showing increased mRNA level of RyR2 in Cnga3−/−/Nrl−/− retinas. Deletion of retGC1 suppressed the upregulation. Data are represented as mean ± SEM 3-4 assays using retinas prepared from 8-10 mice in each group (*P < 0.05, **P < 0.01).