| Efficiency of amino acid utilization in the growing pig at suboptimal levels of intake: lysine, threonine, sulphur amino acids and tryptophan. | |
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MedLine Citation:
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PMID: 15379917 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A series of N balance experiments using growing pigs was conducted to study the efficiency of utilization of lysine, threonine, sulphur amino acids and tryptophan and to estimate their maintenance requirements. Purified diets based on casein and crystalline amino acids as the sole source of N contained graded levels of each amino acid, corresponding to expected protein accretion rate of 0, 33, 66, 99 and 132 g/day, respectively. N retention increased linearly (p < 0.01) as the dietary concentration of the limiting amino acid increased. Based on linear regression equations relating amino acid deposition in body protein to amino acid intake, marginal efficiencies of ileal digestible amino acid utilization were calculated to be lysine 0.91, threonine 0.83, sulphur amino acids 0.85 and tryptophan 0.66. Extrapolating the regression equations to zero N retention, the daily requirements of amino acids for N equilibrium were estimated to be (mg/kg(0.75)) lysine 39, threonine 49, sulphur amino acids 46 and tryptophan 16. |
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Authors:
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J Heger; T Van Phung; L Krizová |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of animal physiology and animal nutrition Volume: 86 ISSN: 0931-2439 ISO Abbreviation: J Anim Physiol Anim Nutr (Berl) Publication Date: 2002 Jun |
Date Detail:
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Created Date: 2004-09-21 Completed Date: 2004-10-25 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 101126979 Medline TA: J Anim Physiol Anim Nutr (Berl) Country: Germany |
Other Details:
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Languages: eng Pagination: 153-65 Citation Subset: IM |
Affiliation:
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Biofaktory Praha s.r.o., Research Centre of Feed Additives, Prague, Czech Republic. biohp@traveller.cz |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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administration & dosage*,
metabolism* Amino Acids, Sulfur / administration & dosage, metabolism Animal Feed Animal Nutritional Physiological Phenomena Animals Female Lysine / administration & dosage, metabolism Nitrogen / metabolism* Nutritional Requirements Protein Biosynthesis* Random Allocation Regression Analysis Swine / growth & development*, metabolism* Threonine / administration & dosage, metabolism Tryptophan / administration & dosage, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Amino Acids, Sulfur; 56-87-1/Lysine; 72-19-5/Threonine; 73-22-3/Tryptophan; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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