(F) Representative immunoblot and quantification of Grk5 protein levels as well as quantification of mRNA levels after Cul1 KD. t-test, n=4 biological replicates. Data information: Error bars indicate means ± SEM; * - P ≤ 0.05, ** - P ≤ 0.01, *** - P ≤ 0.001, **** - P ≤ 0.0001 