The free amino acid profile of the fruiting bodies of Pleurotus ostreatus was studied in detail.
The first evidence for the occurrence of Nδ
-acetyl-L-ornithine in the mushroom was presented, and 33 ninhydrin-positive compounds were determined, besides Nδ
-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, y-aminobutyric acid, saccharopine, α-aminoadipic acid, ethanolamine, cystathionine, and N
-(γ-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.
View full abstract