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Hydroxynorleucine used to introduce amino acid group into carbohydrates.
2003 JUN 11 - (NewsRx.com & NewsRx.net) -- Hydroxynorleucine as a glycosyl acceptor was an efficient means for introducing amino acid functionality into complex carbohydrates.
"A new approach to the synthesis of biologically relevant glycosyl amino acids using a non-natural amino acid as the glycosyl acceptor is described. The procedure involves a glycosylation reaction of a suitable carbohydrate donor with Fmoc-L-hydroxynorleucine benzyl ester," scientists writing in the journal Tetrahedron Letters report.
"This reaction results in the direct incorporation of the amino acid moiety," stated Stacy J. Keding and collaborators at the Sloan-Kettering Institute for Cancer Research in New York. "The acceptor can be used for the preparation of alpha- or beta-O-linked glycosides depending upon the nature of the glycosyl donor. This method has been applied in the synthesis of six different tumor-associated ...
- Amino acid digestibilities needed for poultry rations.(Special Report)
- Magazine article from: Feedstuffs Applegate, T. Thompson, Kristi Dudley-Cash, W.A. July 26, 2004 700+ words
...Formulating commercial broiler diets based on amino acid digestibilities results in rations that...processing. Because formulating based on amino acid digestibility more closely meets the...values that are available. Digestible amino acid values are considered by many to be the...
- Amino Acid Disorders Screening
- Encyclopedia entry from: Gale Encyclopedia of Medicine, 3rd ed. Davidson, Tish January 1, 2006 700+ words
Amino Acid Disorders Screening Definition Amino acid disorder screening checks for inherited disorders in amino acid metabolism. Tests are most commonly done on newborns. Two tests are available, one using a blood sample and the other a urine...
- Indicator Amino Acid Oxidation Is Not Affected by Period of Adaptation to a...
- Magazine article from: The Journal of Nutrition Elango, Rajavel; Humayun, Mohammad A; Ball, Ronald O; Pencharz, Paul B June 1, 2009 700+ words
Abstract The number of days of adaptation to a specific amino acid intake required prior to the determination of amino acid requirements using the indicator amino acid oxidation method (IAAO) is still in debate. In this study, our...
- Amino acid profiling clinical guidelines for determination of preferred...
- Magazine article from: Townsend Letter for Doctors and Patients Bongiovanni, Bradley Feinerman, Judy December 1, 2003 700+ words
...the preferred specimen choice for amino acid testing is a frequent clinical...the evaluation of a patient's amino acid status. An informed decision must...have been concerned with essential amino acid status. Urine is typically reserved...
- Digestible amino acid values more appropriate than total amino acids.
- Magazine article from: Feedstuffs DUDLEY-CASH, WILLIAM A. July 3, 2000 700+ words
Formulation of poultry diets on a digestible amino acid basis has been shown to be superior to the use of total amino acid values. This is especially true when ingredients that have low amino acid digestibility are included in the diet. Information...
- Optimum amino acid level depends on production goal.(Letter to the Editor)
- Magazine article from: Feedstuffs Lemme, A. Petri, A. Pack, M. October 6, 2003 700+ words
...and the estimation of optimum dietary amino acid levels for maximum daily egg mass. Analysis...derive a figure indicating optimum dietary amino acid levels (in this context, the term...with decreasing slope and increasing amino acid supply. For example, the data set given...
- New amino acid profiles found in byproduct feedstuffs in study.(Statistical...
- Magazine article from: Feedstuffs HINDERS, RAY November 13, 2000 700+ words
The amino acid analyses of the California chapter of...composition are reported in this article. The amino acid values are given as the percentage of the buffer insoluble nitrogen fraction (g amino acid/100 g). The byproducts were analyzed...
- Pattern of amino acid requirements in humans: An interspecies comparison using...
- Magazine article from: The Journal of Nutrition McLarney, M J; Pellett, P L; Young, V R July 1, 1996 700+ words
...comparison of essential (indispensable) amino acid requirements, in relation to those for...current, internationally proposed human amino acid requirement patterns are significantly...original form and then expressed as mg amino acid/g total dietary protein (N x 6.25...