| Composition of amino acids in feed ingredients for animal diets. | |
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MedLine Citation:
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PMID: 20842395 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Dietary amino acids (AA) are crucial for animal growth, development, reproduction, lactation, and health. However, there is a scarcity of information regarding complete composition of "nutritionally nonessential AA" (NEAA; those AA which can be synthesized by animals) in diets. To provide a much-needed database, we quantified NEAA (including glutamate, glutamine, aspartate, and asparagine) in feed ingredients for comparison with "nutritionally essential AA" (EAA; those AA whose carbon skeletons cannot be formed by animals). Except for gelatin and feather meal, animal and plant ingredients contained high percentages of glutamate plus glutamine, branched-chain AA, and aspartate plus asparagine, which were 10-32, 15-25, and 8-14% of total protein, respectively. In particular, leucine and glutamine were most abundant in blood meal and casein (13% of total protein), respectively. Notably, gelatin, feather meal, fish meal, meat and bone meal, and poultry byproduct had high percentages of glycine, proline plus hydroxyproline, and arginine, which were 10-35, 9.6-35, and 7.2-7.9% of total protein, respectively. Among plant products, arginine was most abundant in peanut meal and cottonseed meal (14-16% of total protein), whereas corn and sorghum had low percentages of cysteine, lysine, methionine, and tryptophan (0.9-3% of total protein). Overall, feed ingredients of animal origin (except for gelatin) are excellent sources of NEAA and EAA for livestock, avian, and aquatic species, whereas gelatin provides highest amounts of arginine, glycine, and proline plus hydroxyproline. Because casein, corn, soybean, peanut, fish, and gelatin are consumed by children and adults, our findings also have important implications for human nutrition. |
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Authors:
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Xilong Li; Reza Rezaei; Peng Li; Guoyao Wu |
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Publication Detail:
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Type: Journal Article Date: 2010-09-15 |
Journal Detail:
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Title: Amino acids Volume: 40 ISSN: 1438-2199 ISO Abbreviation: Amino Acids Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9200312 Medline TA: Amino Acids Country: Austria |
Other Details:
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Languages: eng Pagination: 1159-68 Citation Subset: IM |
Affiliation:
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Department of Animal Science, Faculty of Nutrition, Texas A&M University, College Station, TX, 77843, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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