FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (22): 297-300.doi: 10.7506/spkx1002-6630-201022064

• Processing Technology • Previous Articles     Next Articles

Extraction Processing of Potato Protein Isolate

QI Bin1,2,ZHENG Li-xue1,PIAO Jin-miao1   

  1. 1. School of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, China;
    2. Suzhou Key Laboratory of Food and Biotechnology, Changshu 215500, China
  • Received:2010-06-28 Online:2010-11-25 Published:2010-12-29
  • Contact: QI Bin1 E-mail:qibin64@126.com

Abstract:

Potato protein isolate (PPI) was prepared from fresh potato by salt-soluble alkali extraction and acid precipitation. Extraction conditions and functional properties of PPI were investigated. SDS-PAGE revealed that PPI was composed of proteins with a broad range of molecular weights, especially rich in proteins with small molecular weight less than 21.0 kD. Meanwhile, the optimal extraction conditions were material-liquid ratio of 1:10 (g/mL), extraction temperature of 40 ℃, pH 8.0, and NaCl concentration of 0.4 mol/L.

Key words: potato, protein isolate, SDS-PAGE

CLC Number: