<p><b>Copyright information:</b></p><p>Taken from "Functional distribution of Ca-coupled P2 purinergic receptors among adrenergic and noradrenergic bovine adrenal chromaffin cells"</p><p>http://www.biomedcentral.com/1471-2202/8/39</p><p>BMC Neuroscience 2007;8():39-39.</p><p>Published online 14 Jun 2007</p><p>PMCID:PMC1906789.</p><p></p>olumn in each histogram represents unresponsive cells (ΔR < 0.2). "UTP + Ca": responses obtained in presence of extracellular calcium; "UTP + EGTA": responses obtained in the virtual absence of extracellular calcium. , leftmost histograms: AD-cells; , rightmost histograms: NA-cells. A lognormal distribution function was fitted to each histogram, not taking into account unresponsive cells. The horizontal bars represent mean ΔR ± S.D
