4. Conclusion
In summary, different types and sources of the co-products
from ethanol processing based cereal grain as energy feedstock
in this study showed difference in protein nutrient and
utilization profiles and protein internal structural makeup.
Although the CLA and PCA analyses revealed similarity in
protein molecular spectra, some protein molecular spectral
feature of the co-products have relationship with protein
nutrient utilization and availability to some extent. The difference
in protein nutritional values in corn co-product and
barley co-products may be mainly explained by different
original cereal grains as energy feedstock and different processing
methods. The difference in protein molecular structure
parameters may account for variations on nutritional
values and biological behaviors.