FIG. 5.

GRK2 expression levels in brain regions from young and mature rats. Protein obtained from relevant brain regions was subjected to SDS-PAGE and Western blotting with a GRK2 antibody. Illustrated for each brain region are representative blots of GRK2 from young (Y; < P20) and older (O; > 5 weeks) rat brains. Relative GRK2 levels were obtained by densitometry and normalized to the corresponding tubulin value (LC n = 5, cortex n = 9, striatum n = 7, hippocampus n = 4; GRK2 expression level in younger animals taken as 100%). *P < 0.05.