人工养殖大鲵皮胶原蛋白的性质研究

被引:18
作者
顾赛麒
李莉
王锡昌
梁炜泷
机构
[1] 上海海洋大学食品学院,上海水产品加工及贮藏工程技术研究中心
关键词
大鲵; 鲵皮; 胶原蛋白; 提取; 理化性质;
D O I
暂无
中图分类号
S966.6 [娃娃鱼(大鲵)养殖];
学科分类号
090801 ;
摘要
在低温4℃条件下,采用酸法(0.5 mol/L乙酸)和酶法(胃蛋白酶)对人工养殖大鲵皮中的胶原蛋白进行了提取,对提取纯化后的两种不同类型的胶原蛋白——酸溶性胶原蛋白(acid-soluble collagen,ASC)和胃蛋白酶酶促溶性胶原蛋白(pepsin-soluble collagen,PSC)其各项理化性质进行了研究。结果表明:ASC和PSC均包含2条α链及它们的二聚体β链,为Ⅰ型胶原蛋白;ASC和PSC中甘氨酸含量最高,其次为谷氨酸和脯氨酸,胱氨酸含量最低;ASC和PSC中亚氨基酸含量分别为144和173(以残基/1 000残基计),两者热变性温度分别为23.5℃和26.5℃,表明PSC的热稳定性较优;ASC和PSC的紫外最大吸收峰分别位于233.0 nm和232.0 nm波长处,符合胶原蛋白的特征;ASC和PSC的红外特征吸收频率相似,均含有酰胺Ⅱ带、酰胺Ⅲ带及在两酰胺带间的一系列吸收峰,表明ASC和PSC中胶原蛋白的三螺旋结构较为完整。
引用
收藏
页码:74 / 79
页数:6
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