The evaluation method for nutrition of small peptide feed
Guo Yudong Zhang Yang Zhang Junguo
(Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030)
Abstract:
Generally, small peptide includes depeptide and tripeptide. Small peptide feed, which
contains a lot of small peptide, is produced with bad protein material by chemical or
biological technique. The nutritional value of small peptide feed includes its advantage in
absorption and its quality. Based on the facts which affect the small peptide feed’s value,
we choose total content of small peptide, average peptide length(APL), content of special
peptide, and content of special amino acide as the index to evaluate the small peptide feed.
The main assay methods include Biuret method, Lowry method, trichloroacetic acid method,
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