Dopamine agonist induces phosphorylation in vivo.

PLA was performed on mouse retinal section following treatment with the D1 agonist A68930. Retinal sections (16 mm) were taken from dark-adapted wild type C57/B6 mice (panels labeled Dark, or Dark + D1 agonist) or dark-adapted melanopsin knockout mice (opn4 ^LacZ/LacZ) (panel labeled Melanopsin knock out + D1 agonisit). Before fixation retina were treated with the dopamine D1 agonist A68930 (labled +D1 agonist) or left untreated (Dark). Outer nuclear layer (ONL): Inner nuclear layer (INL) and Ganglion cell layer (GCL).