... cups. Embryos from the 4-P-PDOT (Mel1b melatonin receptor antagonist) group did not have an S-shaped heart. Previous application of the melatonin, 6-chloromelatonin or forskolin (adenylate cyclase enhancer) prevented the abnormal appearance of chick embryos from the calmidazolium, luzindole, prazosin...

... ) or phentolamine (α 1 and α 2 ) blocked only the positive chronotropic effects of noradrenaline and isoprenaline. The positive inotropic effects of isoprenaline could be blocked by the adenylate cyclase inhibitors MDL-12,330A or SQ-22,536, which had no effect on the chronotropic effects of isoprenaline...

...Edward W. Awad; Michel Anctil ABSTRACT Coupling of the previously characterized β 1 -and β 2 -like adrenoceptors in the sea pansy Renilla koellikeri with adenylate cyclase was examined in membrane preparations from this cnidarian. Adenylate cyclase activity was stimulated by several guanine...

... 1992 © 1993 by Company of Biologists 1993 erythrocyte trout Oncorhynchus mykiss hypoxia β-adrenoceptors adenylate cyclase cyclic AMP catecholamines proton extrusion Na + /H + exchange Exposure of trout erythrocytes to exogenous catecholamines in vitro ( Baroin et al...

.... The dose–response curves for mixtures of forskolin and 5-HT and of peptide DH and 5-HT are all very steep, approximately five times steeper than for any one stimulant alone. Forskolin, 5-HT and extracts of the ganglionic mass all stimulated adenylate cyclase from broken membrane preparations from...