Amino acid composition of beef obtained fromthe specialized meat cattle

Abstract

The article presents the study results of the amino acid composition of beef obtained from young Aberdeen-Angus and Hereford breeds. It has been established that meat is a complete amino acid product. At the same time, the protein quality indicator of beef obtained from the young of Aberdeen-Angus and Hereford breeds of the age of 12 months was 5.55 and 5.34, and from the bulls of the age of 18 months - 5.73 and 5.49, the methionine: tryptophan ratio – 1.22 and 1.23. The youngsters of the age of 18 months of the studied breeds have the same content of aspartic acid in meat, it is 2.03 g/100 g. A comparative analysis of the concentration of essential amino acids in beef showed that there was more of valine, histidine(-amino-5-imidazole propionic acid), lysine, threonine and phenylalanine in the bullheads of Hereford, than the peers of Aberdeen-Angus breed by 3.30, 4.26, 1.11, 7.14 (P> 0.05), and 4.76%, respectively. The concentrations of valine, isoleucine, methionine and tryptophan were higher in Aberdeen-Angus than in Hereford by 3.30, 2.50, 2.00 and 2.50%, respectively. Analyzing the study results of beef on the content of replaceable amino acids in bulls of the age of 18 months, the advantage in concentration of alanine, glycine, glutamic acid, serine, tyrosine, cystine was on the side of Aberdeen-Angus breed, the difference with peers of Hereford breed was 6.50 (P> 0.05), 2.25, 8.28 (P> 0.05), 56.72 (P> 0.001), 1.10 and 9.09 (P> 0.05)%, respectively. and the quantity of solid eutectoid inclusions based on electron compound Cu31Sn8.