title: Effects of muscle pH on pressure-induced changes in the sarcoplasmic reticulum.
abstract: The effect of muscle pH on high pressure treatment of rabbit longissimus dorsi muscles has been studied by the use of pre-slaughter injections of epinephrine in order to vary the glycogen content and thus the extent of post-slaughter glycolysis in the muscles. Following pressure treatment the pH of the muscles varied between 5·9 and 7·1 while the control muscles varied between 6·6 and 7·1. The effects of the high pressure treatment on the ATPase activities, protein yield and protein composition of the sarcoplasmic reticulum (SR) were measured. The basal ATPase activity was not affected over this pH range while the extra ATPase activity, protein yield and protein composition of the SR were affected. The effects increased with decreasing pH.
authors: CSIRO Division of Food Research, Meat Research Laboratory, PO Box 12, Cannon Hill, Queensland 4170, Australia.
authors: D J
authors: DJ
authors: Horgan