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Proteome changes in bovine longissimus thoracis muscle during the early postmortem storage period

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Kjetil Aune


Journal of Proteome Research ; Volume 6. p. 2720–2731. 2007

Jia, Xiaohong; Ekman, Maria; Grove, Harald; Færgestad, Ellen Mosleth; Aass, Laila; Hildrum, Kjell Ivar; Hollung, Kristin

Postmortem changes in protein composition up to 24 h in bovine longissimus thoracis muscle were investigated by two-dimensional gel electrophoresis and MALDI-TOF MS/MS. A total of 47 spots were significantly changed the first 24 h postmortem. The 39 identified proteins can be divided into five groups: metabolic enzymes, defense and stress proteins, structural proteins, proteolytic enzymes, and unclassified proteins. The identified metabolic enzymes are all associated with ATP-generating pathways, either the glycolytic pathway or energy metabolism. In addition, several defense and stress proteins were changed in abundance in this study. These findings contribute to a better understanding of the biochemical processes during postmortem storage of meat.