【摘要】 羊毛是天然蛋白质纤维,其氨基酸组成的变化对羊毛纤维的品质有直接影响。本试验采用还原法从羊毛纤维中提取出经S-羧甲基化修饰的角蛋白,然后水解角蛋白测定氨基酸组成,避免了羊毛中非角蛋白物质和水解破坏胱氨酸对分析结果的干扰。用此法测定新疆绵羊主要品种羊毛的氨基酸组成,结果表明,品质较好的中国美利奴细羊毛,山羊绒毛等有较高的胱氨酸含量。并试从影响角蛋白α螺旋构象的氨基酸组成方面做了初步探讨,结果表明,品质较好的细羊毛均具有较小的螺旋比值。更多还原

【Abstract】 Wool is the proteinaceous natural fiber. The variety of amino acid composition of wool influences on the fiber properties directly. In this paper initial results are reported from a comprehensive research project, in which 14 samples of Xinjiang wool from different origins have been analyzed. As the first step, the wool keratins were extracted with a reduction method and modified by S-carboxy methylation, then determined the amino acid compositions of keratins after acid hydrolysis.Using this method could avoid interferes of cell membrane substances, medulla and pigment of wool, as well as the cystines destroyed during acid hydrolysis.The results suggest that wool infine quality, such as Australian Merino, Chinese Merino (Merino×Xinjiang) and Cashmere etc.,is all with a higher content of cystine, and the effects of some amino acids on wool keratin conformation by helix index have been discussed.更多还原