QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Oltjen, R. R. Articles by Lehmann, R. P. Search for Related Content PubMed PubMed Citation Articles by Oltjen, R. R. Articles by Lehmann, R. P.

Effect of Diethylstilbestrol on the Blood Plasma Amino Acid Patterns of Beef Steers Fed Finishing Diets

United States Department of Agriculture, ARS, Animal Husbandry Research Division, Beltsville, Maryland

Three trials were conducted to determine the effect of diethylstilbestrol (DES) on the blood plasma free amino acid patterns of steers fed finishing diets ad libitum. Results from the trials indicate that when steers were fed diets based upon corn, DES treatment caused a reduction in the concentration of the essential amino acids, except for methionine and histidine which increased. Lysine concentration was especially decreased. Blood plasma concentrations of urea and serine were also depressed due to DES, whereas the concentration of hydroxyproline was markedly increased. When steers were fed a diet based upon wheat in one trial the effect of DES was somewhat different, suggesting that the composition of the diet may have influenced the response.

Manuscript received 28 November 1967.