Amino Acid Analysis and Nutritional Evaluation for Paeonia ostii Seed Protein

Abstract:

Paeonia ositii，known as Tong Lin peony，belongs to the Jiang Nan group. In this experiment，amino acids of the Paeonia ositii seed protein were analyzed using an automatic amino acid analyzer（L-8900） and the nutrition of the amino acid composition was evaluated compared with the whole egg protein，isolated soy protein and the FAO/WHO recommended model. Sixteen amino acids were detected（except tryptophan） and the content of essential amino acids was 38.9%. Nutritional values including essential amino acid index（EAAI，72.3），Biological Value（BV，67.1），Amino Acid Ratio Coefficient（SRC，81.6） and the close degree to whole egg protein（0.90） by the fuzzy recognition method were all higher than those for isolated soy protein. Most of the chemical scores（CS） of Paeonia ostii seed protein were superior or close to those for isolated soy protein. These indicated that Paeonia ositii seed had a good balance index of amino acid composition and could become a new source of high quality amino acids in the near future.