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Differences in the calpain enzyme system in tough and tender samples of porcine longissimus dorsi

  • P.L. Sensky (a1), T. Parr (a1), G.P. Scothern (a1), A. Perry (a2), R.G. Bardsley (a1), P.J. Buttery (a1), J.D. Wood (a2) and C. C. Warkup (a3)...

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The calpain enzyme system plays an important role in the proteolytic events leading to the conversion of muscle to meat in livestock species. Evidence in beef has shown that the levels of calpastatin, the inhibitory component of the system, measured 24 h after slaughter can be used to predict the degree of tenderisation achieved at the end of the normal conditioning period (Koohmaraie et al., 1995). Recent experimental work in pig muscle has shown that calpastatin can be increased by protocols which mimic stress and that these increases relate to changes in tenderness (Sensky et al., 1996; Sensky et al., 1997). In this study differences in the calpain system in randomly selected pigs slaughtered at a commercial slaughterhouse were investigated, with respect to the degree to which the meat tenderised.

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Koohmaraie, M., Killefer, J., Bishop, M. D., Shackelford, S. D., Wheeler, T. L. and Arbona, J. R. 1995. Calpastatin-based methods for predicting meat tenderness. In Expression of tissue proteinases and regulation of protein degradation as related to meat quality (eds. Ouali, A., Demeyer, D. I. and Smulders, F. J. M.), pp 395411, ECCEAMST, Utrecht, The Netherlands.
Sensky, P. L., Parr, T., Bardsley, R. G. and Buttery, P. J. 1996. Relationship between plasma epinephrine concentration and the activity of the calpain enzyme system in porcine longissimus muscle. Journal of Animal Science 74: 380387.
Sensky, P. L., Parr, T., Bardsley, R. G. and Buttery, P. J. 1997. The effect of varying the degrees of (β-receptor stimulation on the activity of the calpain - calpastatin system at slaughter in porcine longissimus dorsi. Proceedings of the British Society of Animal Science 1: 104.

Differences in the calpain enzyme system in tough and tender samples of porcine longissimus dorsi

  • P.L. Sensky (a1), T. Parr (a1), G.P. Scothern (a1), A. Perry (a2), R.G. Bardsley (a1), P.J. Buttery (a1), J.D. Wood (a2) and C. C. Warkup (a3)...

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