FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (23): 96-100.doi: 10.7506/spkx1002-6630-201023023

• Basic Research • Previous Articles     Next Articles

Comparison on the Stability of Collagens from Skin and Bone of Carp (Cyprinus carpio) Caught in Winter and Summer

DUAN Rui1,2,*,ZHANG Jun-jie1,2,CHEN Ling1,KONNO Kunihiko3,XU Bing1   

  1. 1. School of Marine Science and Technology, Huaihai Institute of Technology, Lianyungang 222005, China;
    2. Jiangsu Marine Resources Development Research Institute, Lianyungang 222005, China;
    3. Faculty of Fisheries Sciences, Hokkaido University, Hokkaido 041-8611, Japan
  • Received:2010-03-02 Revised:2010-11-13 Online:2010-12-15 Published:2010-12-29
  • Contact: DUAN Rui E-mail:duanrui526@yahoo.com.cn

Abstract:

The acid-soluble collagens (ASC) were isolated from skin and bone of carp (Cyprinus carpio) caught in the winter (February in 2008) and summer (July in 2008). Thermal stability of collagens was studied by the increased pepsin digestibility upon heating and by circular dichroism (CD) spectroscopy. Collagens from skin and bone in the winter (w-skin ASC and w-bone ASC) exhibited transition curves with midpoints of 31.0 ℃and 32.8 ℃, respectively, which were 1.0 ℃ and 0.6 ℃ below their equivalents from summer season fish. The CD spectrum changes of collagens upon heating were in accordance with the results of pepsin digestion. The results indicated that collagens from skin and bone of summer carp were more stable than their equivalents of winter.

Key words: collagen, thermostability, pepsin digestion, circular dichroism

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