Association of Bio-energy Processing-Induced Protein Molecular Structure Changes with CNCPS-Based Protein Degradation and Digestion of Co-products in Dairy Cows.
The primary objective of this study was to develop a model to predict Cornell Net Carbohydrate Protein System (CNCPS) protein degradation and digestion based on protein molecular structure changes induced by bio-energy processing in different types of co-products (CoPR, CoPC, CoPS = co-products from bioprocessing of rapeseed, canola seed, and soybean, respectively). The results showed that the inherent structure changes induced by the processing had a close relationship with CNCPS predicted protein degradable, undegradable, and digestible contents. The amide I to II ratio and α-helix to β-sheet ratio could be used to predict total degradable protein (R(2) = 0.99, RSD = 0.84, P < 0.001). Total CNCPS intestinal digestible protein could be predicted by protein structure α-helix to β-sheet ratio (R(2) = 0.93, RSD = 0.33, P < 0.001). In conclusion, the processing-induced protein molecular structure changes were highly linked to protein nutritive value of the co-products and could be used as predictors for CNCPS protein degradation and digestion in dairy cattle.
Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan , 51 Campus Drive, Saskatoon, SK, S7N 5A8, Canada.|College of Animal Science and Technology, Northeast Agricultural University , Harbin 150030, China.
Xinxin
X
Li
College of Animal Science and Technology, Northeast Agricultural University , Harbin 150030, China.
Yonggen
Y
Zhang
Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan , 51 Campus Drive, Saskatoon, SK, S7N 5A8, Canada.
Peiqiang
P
Yu
D000818:Animals; D056804:Biofuels / Q000032:analysis*; D029688:Brassica napus / Q000737:chemistry*; D029741:Brassica rapa / Q000737:chemistry*; D002417:Cattle; D002681:China; D004063:Digestion; D010940:Plant Proteins / Q000737:chemistry*; D059748:Proteolysis; D012639:Seeds / Q000737:chemistry*; D013025:Glycine max / Q000737:chemistry*
D056804:Biofuels; D010940:Plant Proteins
CNCPS-based protein degradation and digestion; co-products from bio-energy processing; protein molecular structure