Axonal projections of GAD65LH cells. (A, Left) Scheme for targeting ChR2-YFP to GAD65LH cells. (A, Right) DAPI-stained (blue) 30-μm sagittal section of the whole brain showing GAD65LH projections (green) to brain areas like the accessory olfactory bulb (AOB), LH, thalamus (TH), midbrain (MB), and medulla (representative example of three brains). (B) High magnification of brain areas where dense GAD65-ChR2-YFP axons are found (representative example of three brains).