A. Western blot of the 5-HT2Breceptor in homogenates of SMA from sham (n = 6) and DOCA-salt (n = 6) rats. Arrows = band or region of interest. B. Immunohistochemical staining of the 5-HT2B receptor in SMA sections from sham and DOCA-salt rats. Images are sections of SMA incubated with and without primary antibody and taken with 20X objective. E = endothelium, M = media, A = adventitia, S = staining in rat brain, L = lumen (n = 6). C. Cumulative concentration response curve to BW723C86 vs. vehicle (H20) in SMA contracted with U46619 in sham and DOCA-salt SMA. Data points represent mean ± SEM for the number of animals in parentheses.