5种可食性海洋动物氨基酸成分的比较分析

Analysis of Amino Acid in Five Edible Marine Animals

分析比较了枝吻类组虫的氨基酸成份,并与沙蚕、星虫、泥蚶、鲍鱼4种可食性海洋动物间不同的氨基酸成分.结果表明:5种动物的氨基酸组成基本一致,均含有18种氨基酸,且8种必需氨基酸的总百分数分别为34.31%、39.35%、33.14%、36.15%、32.94%;鲜味氨基酸总百分含量分别为48.81%、46.02%、47.51%、44.67%、52.23%.纽虫的必需氨基酸指数为36.65.综合分析可见:纽虫的营养价值符合FAO/WHO推荐的理想蛋白模式,鲜味氨基酸含量非常高,仅低于鲍鱼,高于其他3种动物.

The content of amino acid in nemertea is investigated, and compared with four catagories of edible marine organism, i.e., Perinereis aibuhitensis, Sipunculus nudus, Tegillarca granosa and Abalone. Conclusions may be drawn based on the test results： eighteen kinds of amino acids were identified in the five marine organism, i.e., 8 essential amino acids （Thr, Val, Met, Phe, Ile, Leu, Lys and Trp）, 2 half-essential amino acids （His and Arg） and 8 nonessential amino acids （Asp, Glu, Ser, Gly, Ala, Tyr, Cys and Pro）. The contents of total essential amino acids in dry samples from the five edible marine organism were 34.31%, 39.35 %, 33.14%, 36.15 %, 32.94 % respectively; the contents of total flavour amino acids were 48.81%, 46.02 %, 47.51%, 44.67 %, 52.23 % respectively. The essential amino acids index（EAAI） of nemertea was 36.65. It is noted that the ratio of essential of amino acids of Nemertea is in good agreement with FAO/WHO protein model. The proportion of flavour amino acid is rather height. This proportion figure is only below that of Abalone, and greater than that of other three organism.