GRIA2 and epilepsy: Similar to Y869/Y873/Y876 phosphorylation level, GRIA2 S880 phosphorylation level was reduced to 0.56-fold of control level in the vehicle-treated epilepsy rats (t(12) = 12.6, p < 0.001 vs. control animals, Student t-test; Figure 3A,E and Figure S1).