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Extraction and identification of the chyme proteins in the digestive tract of growing pigs

  • Jianjun Li
  • Bie Tan
  • Yulong Tang
  • Peng Liao
  • Kang Yao
  • Peng Ji
  • Yulong Yin
Research Paper
  • 2 Downloads

Abstract

This study aimed to explore the rule of degradation of dietary proteins by identifying chyme proteins in different segments of the digestive tract of growing pigs, using proteomics techniques. Six growing pigs were fed a corn-soybean meal-based diet for 7 days. The feedstuff and chyme proteins were separately extracted and separated with SDS-PAGE. 2D LCMS/MS combined with protein database searching identified 1,513 proteins in different segments of the gastrointestinal tract, the number of identified exogenous proteins gradually decline from the stomach to colon, with large amounts in the duodenum to the large intestine. More corn proteins than soybean proteins were identified both in the feedstuff and chyme, and these were significantly decreased after digestion in the stomach. More membrane proteins than non-membrane proteins were identified in whole digestive tract. These results regarding the profiles of chyme proteins in different segments of the gastrointestinal tract would provide useful information for optimizing feed formula in pigs.

Keywords

protein profiles degradation law proteomics digestive tract growing pigs 

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Notes

Acknowledgements

This work was supported by the Natural Science Foundation of Hunan Province (2017JJ2307, 2016JJ4087), the National Natural Science Foundation of China (31402091, 31330075, 31372326, 31672433, 31560640), State Key Laboratory of Food Science and Technology, Nanchang University (SKLF-ZZB-201710) and International Partnership Program of Chinese Academy of Sciences (161343KYSB20160008).

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical AgricultureChinese Academy of SciencesChangshaChina
  2. 2.Department of NutritionUniversity of California DavisDavisUSA

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