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Figure 6 Changes in adenylyl cyclase activity in sham-operated (SOP) (n = 9) and uremic (SNX) rats (n = 7) after stimulation with isoprenaline given as means ± SEM. For details of the protocol, see text. Significant differences between both groups are indicated by an asterisk (pD₂ values: SOP, 8.18 ± 0.25; SNX, 7.95 ± 0.24, NS).