[Enzyme metabolic and contractile activities of 30 pig muscles. Relation with the final ph attained after death].
This paper presents a study of the metabolic and contractile types of 34 samples from 30 muscles in five crossbred Pietrain-Large White pigs 6 to 7 months old. The activity of the following enzymes was measured: glyceraldehyde-3-phosphate dehydrogenase (GAPDH), lactate dehydrogenase using high (LDH-h) or low (LDH-b) pyruvate concentrations in the reaction medium, citrate synthase (CS), and myofibrillar Ca-Mg activated ATPase. Haeminic iron and ultimate pH (pHu) were measured on the same samples. The results showed a negative, rather linear relationship between GAPDH, LDH and ATPase activities on the one hand and CS and haeminic iron on the other. Rather high correlations (r = 0.7 to 0.8) were observed between metabolic and contractile criteria and pHu; the red (slow) muscles had the highest pHu.
Laborde
D
D
Talmant
A
A
Monin
G
G
D000818:Animals; D017301:Ca(2+) Mg(2+)-ATPase / Q000378:metabolism; D000252:Calcium-Transporting ATPases / Q000378:metabolism; D002950:Citrate (si)-Synthase / Q000378:metabolism; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000378:metabolism; D006418:Heme / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000378:metabolism; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D011180:Postmortem Changes; D013552:Swine / Q000502:physiology*
D006418:Heme; D007501:Iron; D007770:L-Lactate Dehydrogenase; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D002950:Citrate (si)-Synthase; D017301:Ca(2+) Mg(2+)-ATPase; D000252:Calcium-Transporting ATPases
Activités enzymatiques métaboliques et contractiles de 30 muscles du Porc. Relations avec le pH ultime atteint après la mort.