Nutritional Value Assessment of Protein from Mycelia and Fruit Bodies of Boletus edulis

The international adopted nutrient value assessment method was applied to the overall assessment of protein nutrient value of the submerged cultivated mycelium and fruit bodies of Boletus edulis.The protein contents in mycelia and fruit bodies of Boletus edulis were 28.40% and 25.10%,respectively.The first and second limiting amino acids in mycelia of Boletus edulis were sulfur-containing amino acids(methionine and cystine) and lysine,and the first and second limiting amino acids in fruiting bodies were sulfur-containing amino acids and isoleucine.The amino acid score(AAS),chemical score(CS),essential amino acid index(EAAI),biological value(BV),nutritional index(NI) and score of ratio coefficient of amino acid(SRCAA) of the submerged cultivated mycelium protein from Boletus edulis were 31.43,39.50,44.55,36.86,12.65 and 24.47,respectively,which were higher than those of mycelium protein from Boletus edulis when compared with corresponding values of 71.43,67.02,63.86,57.91,16.03 and 68.55 for fruit bodies.