Phosvitin phosphopeptide preparation using immobilised trypsin and enhancing calcium absorption in growing rats

Qiang Zhong, Xing-Ling Li, Wei-Dong Hu, Bo Zeng, Ren-Ming Liang, Hui Liu, Zai-Xin Li and Zhi Zhang
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Qiang Zhong: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Xing-Ling Li: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Wei-Dong Hu: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Bo Zeng: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Ren-Ming Liang: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Hui Liu: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Zai-Xin Li: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China
Zhi Zhang: School of Chemical and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, P.R. China

Czech Journal of Food Sciences, 2016, vol. 34, issue 4, 325-331

Abstract: We demonstrate a new, efficient method for the preparation of phosvitin phosphopeptides using immobilised-trypsin enzymolysis technology. Immobilised trypsin was prepared using a covalent binding method, and then was added to degrade egg yolk phosvitin for the production of phosphopeptides. In our results, the prepared immobilised trypsin demonstrated a higher hydrolysing activity toward phosvitin than free trypsin, and the hydrolysing activity was retained well even after trypsin was repeatedly used up to five times. Interestingly, the phosvitin phosphopeptides prepared with immobilised trypsin demonstrated a lower N/P ratio and a higher calcium-binding efficiency than those prepared with free trypsin. Furthermore, phosphopeptides significantly increased the rate of calcium absorption and serum calcium content in vivo. Based on these results, we conclude that trypsin immobilised onto chitosan has a greater phosvitin hydrolysing activity than free trypsin, and the prepared phosphopeptides can be used as a new calcium supplement to significantly increase calcium absorption in growing rats.

Keywords: phosvitin; phosphopeptide; immobilisation; calcium-binding efficiency; calcium; absorption (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:34:y:2016:i:4:id:425-2015-cjfs

DOI: 10.17221/425/2015-CJFS

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