Protein content and amino acid concentrations in m. longissimus dorsi of lambs of various genotypes
1996
Swartvagherova, K. | Ochodnicky, D. | Margetinova, J. (Vyskumny Ustav Zivocisnej Vyroby, Trencin (Slovakia). Stanica Chovu a Slachtenia Oviec a Koz) | Palanska, O. | Ceresnakova, Z.
The objective of a trial was to study the effect of breed on protein content and their amino acid composition in M. longissimus dorsi of lambs of inland sheep breeds: Tsigai, Merino and Improved Wallachian. The lambs had free choice of feed mix VJ to the live weight of 35.0 kg. Total protein content was determined by Kjeldahl method. Amino acid concentrations were determined after acid hydrolysis of proteins by ion exchange chromatography on an amino acid analyzer T 339. Total protein content ranged from 20.66 to 20.90 %, without any statistically significant differences. Improved Wallachian lambs had the lowest content of amino acids (75.77 g/16 g N), the difference was statistically significant (p0.05) in comparison with the other two genotypes. The differences in amino acid concentrations between the lambs of Tsigai and Merino breeds were negligible (83.99 and/or 84.62 g/16 g N), while Tsigai lambs had the highest content of essential amino acids (32.43 g/16 g N). Lambs of the Merino breed had the worst content of essential amino acids out of their total (37.41 %). The highest content out of all amino acids was recorded for glutamic acid (11.70-13.24 g/16 g N).
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