Effect of concentration,pH and ionic strength on the kinetic self-assembly of acid-soluble collagen from walleye pollock (Theragra chalcogramma) skin |
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| Authors: | Mingyan Yan Bafang Li Xue Zhao Song Qin |
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| Affiliation: | 1. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, No. 17, Chunhui Road, Yantai, Shandong Province 264003, PR China;2. College of Food Science and Technology, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, PR China |
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| Abstract: | The effects of concentration, pH value and ionic strength on the kinetic self-assembly of acid-soluble collagen from walleye pollock (Theragra chalcogramma) skin were investigated. A two-phase kinetic process was provided which included the formation of nucleus center and nucleus growth, the first phase being the controlled step for collagen self-assembly. Collagen showed marked assembly behavior when concentration reaching and above 0.6 mg/mL, and higher concentration could accelerate collagen self-assembly. Rate constants of the first and second assembly phase both increased with pH to a maximum around pH 7.2 and then decreased, indicating that pH 7.2 was the optimum pH value for collagen self-assembly. The kinetics of collagen self-assembly could be modulated by NaCl concentration. The concentration of NaCl from 30 to 60 mM was more suitable to self-assemble for pollock skin collagen. |
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| Keywords: | Collagen Kinetic Self-assembly Walleye pollock Fish skin |
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