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Influence of Prerigor Pressurization on Postmortem Beef Muscle Creatine Phosphokinase Activity and Degradation of Creatine Phosphate and Adenosine Triphosphate
Author(s) -
ELKHALIFA E. A.,
ANGLEMIER A. F.,
KENNICK W. H.,
ELGASIM E. A.
Publication year - 1984
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1984.tb12477.x
Subject(s) - creatine kinase , creatine , adenosine triphosphate , chemistry , phosphate , medicine , biochemistry
Semimembranosus muscle was excised immediately following slaughter and pressurized at 103.5 MN −2 for 2 min at 35°C. Creatine phosphate (CP), adenosine‐5′‐triphosphate (ATP) and R‐values (a measure of metabolic rate) were determined at 1, 2, 4, and 24 hr postmortem. Creatine phosphokinase activity (CPK) was measured at 1 and 24 hr postmortem. Pressurization accelerated catabolism of both CP and ATP which, in turn, resulted in a higher ATP turnover value than that of the control. R‐values were significantly correlated (r=−0.95) with degradation of ATP and indicate onset of rigor mortis in treated muscle immediately after pressurization. CPK activity was significantly higher (P<0.05) in the pressurized muscle than in the control at 1 hr postmortem. However, this difference did not exist at 24 hr postmortem.