title: (+)-alpha-(N-1-phenethyl) urea stereospecifically inhibits Ca2+ - but not ADP-stimulated mitochondrial respiration.
abstract: The (+) isomer of alpha-(N-1-phenethyl) urea is a moderately potent inhibitor of Ca2+ -stimulated mitochondrial respiration of 45Ca2+ uptake (50 percent inhibition at 0.18 mM) while having no effect on adenosine diphosphate-stimulated respiration; the (-) isomer is without effect up to 4 mM. beta-Phenethylurea does not inhibit with either stimulus. The data support the involvement of a Ca2+ -specific protein in energized mitochondrial Ca2+ uptake.
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology*; D000818:Animals; D001692:Biological Transport / Q000187:drug effects; D002118:Calcium / Q000378:metabolism / Q000494:pharmacology*; D006146:Guanidines / Q000494:pharmacology; D006168:Guinea Pigs; D008930:Mitochondria, Liver / Q000378:metabolism*; D010101:Oxygen Consumption / Q000187:drug effects*; D010671:Phenylurea Compounds / Q000494:pharmacology*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D006146:Guanidines; D010671:Phenylurea Compounds; D000244:Adenosine Diphosphate; D002118:Calcium