膜技术回收马铃薯蛋白的基本性能

The preliminary characters of recycling potato protein through membrane technology

采用SDS-PAGE凝胶电泳、HPLC等方法分析了膜法回收所得马铃薯蛋白质的相对分子质量分布、氨基酸含量、功能性质及生物碱含量。结果表明:膜技术回收所得马铃薯蛋白保留了原马铃薯中的两类主要蛋白质——马铃薯糖蛋白(patatin)和蛋白酶抑制剂,营养及功能性与大豆分离蛋白相当,生物碱含量远低于热絮凝方法所得马铃薯蛋白。

In this paper,we focused on the preliminary characters of recycling potato protein through membrane technology. We analyzed the molecular weight distribution,amino acid content,functional properties,and alkaloid content of potato protein through SDS-PAGE and HPLC. The results suggested that the potato retained patatin and protease inhibitors,which are the two major proteins of potatoes. Its nutritional value and functional properties were equivalent to soybean protein isolate; it had lower alkaloid content compared to the result of the thermal coagulation method.