title: Changes in monoamine oxidase activity by mitochondria isolated from late embryos of Bufo bufo.
abstract: 1. Monoamine oxidase activity has been assayed in mitochondria isolated from post-neural embryos (stages 14-25) of Bufo bufo, using 5-HT and PEA as substrates. 2. Mitochondria isolated from stages 19 to 25 show an increasing ability in deaminating monoamines, PEA being metabolized at a higher level with respect to 5-HT. 3. At all the examined stages 5-HT is metabolized by an enzyme corresponding to MAO A, while PEA, from stage 19, is largely deaminated by a semicarbazide-sensitive amine oxidase (SSAO). 4. The effect of Triton X-100 on MAO A activity appears remarkably different in mitochondria isolated from embryos at stages 14 and 25 respectively.
mesh_terms: D000818:Animals; D002023:Bufo bufo / Q000196:embryology / Q000378:metabolism*; D004625:Embryo, Nonmammalian / Q000378:metabolism; D008928:Mitochondria / Q000201:enzymology*; D008995:Monoamine Oxidase / Q000378:metabolism*; D008996:Monoamine Oxidase Inhibitors / Q000494:pharmacology; D017830:Octoxynol; D010627:Phenethylamines; D011092:Polyethylene Glycols / Q000494:pharmacology; D012701:Serotonin
chemical_list: D008996:Monoamine Oxidase Inhibitors; D010627:Phenethylamines; C029261:phenethylamine; D012701:Serotonin; D011092:Polyethylene Glycols; D017830:Octoxynol; D008995:Monoamine Oxidase