Biochemical alterations in the Musculus triceps brachii and Musculus longissimus thoracis during early postmortem period in pigs. (June 2019)

• Record Type: Journal Article
• Authors: Krischek, C.; Popp, J.; Sharifi, A.R.
• Is Part Of: Meat science. Volume 152(2019)
• Page Start: 121
• Page End: 126
• Publication Date: 2019-06
• Subjects: Pig -- Postmortem metabolism -- Musculus longissimus thoracis -- Musculus triceps brachii -- Mitochondrial respiration -- Metabolic enzymes; Meat -- Periodicals; Meat industry and trade -- Periodicals; Viande -- Périodiques; Viande -- Industrie -- Périodiques; Meat; Meat industry and trade; Periodicals; 641.36
• DOI: 10.1016/j.meatsci.2019.02.023
• Languages: English
• ISSNs: 0309-1740

Abstract

Abstract: Muscle-to-meat-transition is influenced by alterations of the energy metabolism. Porcine Musculus triceps brachii (MT) consisted of more fast-twitch-glycolytic muscle fibers and samples, collected 0, 10 and 20 min after slaughter (p.m.), showed higher mitochondrial respiratory activities and ATP concentrations than Musculus longissimus thoracis (LT) samples. Enzyme activities in MT were higher at 0 min (glycogen phosphorylase (GP)), 10 min (GP, citrate synthase (CS)) and at 20 min p.m. (CS). However, LT results were higher at 0 min (lactate dehydrogenase (LDH)), 10 min (phosphofructokinase (PFK), LDH) and at 20 min p.m. (PFK, F0 F1 -ATPase (F0 F1 )). Between 0 min and 10 min p.m. CS activities decreased in LT and MT samples, PFK increased in LT and GP in MT samples. Between 10 min and 20 min p.m. PFK and LDH decreased in LT and GP in MT samples, whereas F0 F1 increased in LT and CS in MT samples. The data indicate that muscles with different mitochondria contents show clearly different energy metabolism characteristics.