FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (7): 217-222.doi: 10.7506/spkx1002-6630-201307045

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Optimization of Extraction of Pepsin-soluble Collagen from Anglerfish Skin

WANG Pei,SU Xiu-rong*,ZHANG Yong-fei,LI Xing-bo,SUN Jing   

  1. Faculty of Life Science and Biotechnology, Ningbo University, Ningbo 315211, China
  • Received:2012-03-12 Revised:2013-02-22 Online:2013-04-15 Published:2013-03-20
  • Contact: SU Xiu-rong E-mail:suxiurong@gmail.com

Abstract: Response surface methodology was applied to establish the optimum conditions for extracting pepsin soluble collagen (PSC) from anglerfish skin. Three independent variables including liquid-to-solid ratio, enzyme loading and hydrolysis time were primarily investigated by one-factor-at-a-time design. Further, Box-Behnken optimization design was used to optimize three different levels of these experimental variables. Additionally, this study characterized physiochemical properties of PSC from anglerfish skin. The optimum process conditions for PSC extraction from anglerfish skin were found to be extraction at 4 ℃ for 48 h with an enzyme loading of 3% and a liquid-to-solid ratio of 18:1. Under the optimized conditions, the extraction efficiency of PSC from anglerfish skin was 2.11%. The PSC extract obtained were determined to contain 16% Arg and 18% Tyr. DSC showed a shrinkage temperature of 48.9 ℃ from the PSC extract. SDS-PAGE suggested that the triplehelical structure of collagen basically remained intact. The PSC exhibited a multiporous network structure under SEM.

Key words: collagen, anglerfish, PSC, network structure

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