D- VS L-methionine utilization by growing steers

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dc.contributor.author Campbell, C.G.
dc.contributor.author St. Jean, G.
dc.contributor.author Titgemeyer, Evan C.
dc.date.accessioned 2010-09-10T19:56:13Z
dc.date.available 2010-09-10T19:56:13Z
dc.date.issued 2010-09-10T19:56:13Z
dc.identifier.uri http://hdl.handle.net/2097/4894
dc.description.abstract Increasing the amino acid supply to the small intestine of growing cattle can increase performance, if specific amino acids are limiting. Although this can be accomplished by feeding rumen undegradable protein, a more economical approach may be supplementing only those amino acids that actually limit performance, but in a form that will bypass the rumen. Methionine (MET) is thought to be a limiting amino acid for growing cattle. DL-MET, a 50 :50 mixture of natural methionine (L-MET) and the unnatural optical isomer (D-MET) is used widely in monogastric rations. Ruminally protected DL-methionine is also available for cattle; however, little information is available about its utilization by growing steers. We studied the efficiency of utilization of D- vs L-MET by growing steers by measuring nitrogen retention of steers postruminally supplemented with graded levels of D- or LMET. Nitrogen retention increased linearly in response to infusion of both L-MET and D-MET, with similar responses for the two isomers. The efficiency of utilization of DMET relative to L-MET was estimated to be 95.5%. In conclusion, D-MET was similar to L-MET in increasing nitrogen retention of growing steers. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1994 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 94-373-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 704 en_US
dc.subject Beef en_US
dc.subject Methionine en_US
dc.subject Growing steers en_US
dc.subject Nitrogen retention en_US
dc.title D- VS L-methionine utilization by growing steers en_US
dc.type Conference paper en_US
dc.date.published 1994 en_US
dc.citation.epage 13 en_US
dc.citation.spage 12 en_US
dc.description.conference Cattlemen's Day, 1994, Kansas State University, Manhattan, KS, March 4, 1994 en_US
dc.contributor.authoreid etitgeme en_US

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