This month's installment of Generally Physiological concerns signals from apoptotic cells that promote muscle development, food dyes that selectively block the pannexin 1 (Panx1) ATP channel, and photoperiod-dependent switches in neurotransmit-ter phenotype. The multinucleated myofibers that make up muscle are generated through the fusion of mononuclear myoblasts. Noting that a signaling module...

Isoproterenol and cAMP Block ERK Phosphorylation and Enhance [Ca]i Increases and Oxygen Consumption by Muscarinic Receptor Stimulation in Rat Parotid and Submandibular Acinar Cells Stephen P. Soltoff and Lee Hedden From Division of Signal Transduction, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, 02115 Running head: Isoproterenol blocks ERK phosphorylatio...

Isoproterenol and cAMP Block ERK Phosphorylation and Enhance [Ca]i Increases and Oxygen Consumption by Muscarinic Receptor Stimulation in Rat Parotid and Submandibular Acinar Cells Stephen P. Soltoff and Lee Hedden From Division of Signal Transduction, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, 02115 Running head: Isoproterenol blocks ERK phosphorylatio...