title: First evidence for the occurrence of N delta-acetyl-L-ornithine and quantification of the free amino acids in the cultivated mushroom, Pleurotus ostreatus.
abstract: The free amino acid profile of the fruiting bodies of Pleurotus ostreatus was studied in detail. The first evidence for the occurrence of N delta-acetyl-L-ornithine in the mushroom was presented, and 33 ninhydrin-positive compounds were determined, besides N delta-acetyl-L-ornithine. Alanine, glutamic acid, valine, glutamine, glycine and leucine were predominant protein amino acids occurring in the free form. As regards the non-protein amino acids, ornithine, gamma-aminobutyric acid, saccharopine, alpha-aminoadipic acid, ethanolamine, cystathionine, and N-(gamma-glutamyl)ethanolamine were mainly detected. The sum of the nitrogen of the three abundant amino acids, alanine, glutamic acid and ornithine, accounted for about 40% of the total nitrogen in the amino acid fraction.
mesh_terms: D000085:Acetates / Q000032:analysis; D019342:Acetic Acid; D000596:Amino Acids / Q000032:analysis*; D001487:Basidiomycota / Q000032:analysis*; D005504:Food Analysis; D009584:Nitrogen / Q000032:analysis; D009952:Ornithine / Q000031:analogs & derivatives* / Q000032:analysis; D011124:Polyporaceae / Q000032:analysis*
chemical_list: D000085:Acetates; D000596:Amino Acids; C021951:N(delta)-acetylornithine; D009952:Ornithine; D009584:Nitrogen; D019342:Acetic Acid