FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (21): 81-84.doi: 10.7506/spkx1002-6630-201021018

• Basic Research • Previous Articles     Next Articles

Sequential Extraction of Protein Fractions from Chinese Soft-shelled Turtle (Pelodiscus sinensis) and Their Antioxidant Activities

LIU Yan1,LIU Cheng-chu1,*,YANG Jing-ya1,LIU Qi-gen2,LI Ying-sen2,LI Jia-le2,3   

  1. 1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China;
    2. Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University,
    Shanghai 201306, China;3. Aquaculture Division, E-Institute of Shanghai Universities, Shanghai 201306, China
  • Received:2010-06-29 Online:2010-11-15 Published:2010-12-29
  • Contact: LIU Cheng-chu E-mail:ccliu@shou.edu.cn

Abstract:

Protein fractions were separated and purifies from wild Chinese soft-shelled turtles using sequential extraction procedures and their antioxidant activities were investigated by DPPH free radical scavenging and reducing power assays. It was found that the glycoprotein and water-soluble protein fractions had higher antioxidant effect in a positive concentrationdependent fashion, with half maximal inhibitory concentrations (IC50) of 0.21 mg/mL and 1.94 mg/mL, respectively. These results suggest that the protein fractions from Chinese soft-shelled turtle possess strong antioxidant activities and have a great potential to be developed as a healthcare food or a nutriceutical.

Key words: Chinese soft-shelled turtle (Pelodiscus sinensis), sequential extraction, purification, amino acids, antioxidant capability

CLC Number: