中华鳖肉蛋白质营养特征分析及评价
Characteristics of protein from Chinese soft-shelled turtle meat (Trionyx sinensis)
-
摘要: 为了合理利用中华鳖资源,测定了其腿肉及裙边一般营养成分,并对其中的蛋白质进行了组分的分离,之后通过氨基酸自动分析仪对中华鳖腿肉及其分离蛋白进行了氨基酸组成的进一步研究。实验结果表明:中华鳖腿肉及裙边蛋白质含量分别为18.20%、20.97%(占湿重),脂肪含量很低分别为0.96%、0.42%。其腿肉蛋白质组成中肌原纤维含量最高,占总蛋白质总量的39.47%,肌浆蛋白含量次之(31.79%),总基质蛋白含量最低(28.72%)。裙边蛋白质组成中,以总基质蛋白为主,占总蛋白含量的92.25%。分析中华鳖腿肉及分离蛋白的氨基酸组成,各蛋白氨基酸比例存在一定的差距。腿肉及其中的肌原纤维蛋白必需氨基酸含量符合FAO/WHO理想蛋白模式,对比其各蛋白组分发现只有腿肉氨基酸评分(AAS)均大于100,说明中华鳖腿肉营养更均衡,具有较高的营养价值。Abstract: For the rational use of Chinese soft-shelled turtle, the proximate composition of muscle ( legs and carina) was determined and protein composition was separated.Amino acid composition of leg muscle and its separated protein components was studied by amino acid analyzer. The results showed high protein content of 18.20% ( weight weight) and 20.97% ( weight weight) , low fat content with 0.96% ( weight weight) and 0.42% ( weight weight) respectively in the legs and carina.The proportion of sarcoplasmic protein, myofibrillar protein, stroma protein of the legs was 31.79%, 39.47%, 28.72%, respectively. In the carina, mainly composed of stroma protein, which accounted for 92.25%.There were some differences in the proportion of each protein amino acid.The legs and myofibrillar protein in the line with the Food and Agriculture Organization of the United Nations /World Health Organization ( FAO /WHO) standard.Compared the amino acid scores ( AAS) of each protein in the legs, we found that only in the legs, the AAS was all above 100.So, compared to its protein components, the leg muscle was a more balanced food.
下载: