PRKCA and ischemia: PKCα, PKCβ1, and PKCβ2 mRNA levels tended to be lower in the retinal arteries and in the neuroretinas from the eyes exposed to ischemia followed by 5 h, 12 h, and 20 h of reperfusion compared to sham-operated eyes (Figures 1A,B); however these differences did not reach statistical significance (for exact p-values, see Figures 1A,B).