On the cover: Cellular localization of transgene expression within the rostral ventrolateral medulla (RVLM). Photomicrographs showing the distribution of green flourescence protein (GFP) (green) and either the AT₁ receptor (A; red), neuron-specific marker, neuronal microtubular protein (NeuN) (B; red), or anti-glial fibrillary acid protein (GFAP) (D; red), within the RVLM following microinjection of an adenovirus encoding the wild-type rat AT_1A receptor (AdNHAAT_1A). No colocalization of GFP and NeuN was observed. Areas of potential colocalization in B (yellow spots) are where processes from 2 different cells overlap. Cellular colocalization of GFP and the AT_1A receptor was always observed. C and D are the same field, photograph under different filters, showing colocalizations of GFAP and GFP in one cell. Scale bar is μm in A, 50 μ in B, and 25 μ in D. (see page 1058.)