Blackwell Publishing Journal Backfiles 1879-2005
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Process Engineering, Biotechnology, Nutrition Technology
Muscle from stress-susceptible and stress-resistant pigs was studied for capillary distribution and fiber characteristics. More capillaries were associated with red fibers than white fibers and there was a greater capillary to fiber ratio in red than white muscle. There was no difference in capillary fiber ratio between normal (from stress-resistant pigs) and PSE (from stress-susceptible pigs) muscle. Muscle from stress-susceptible animals had more intermediate fibers than did muscle from stress-resistant animals. Certain intermediate fibers from stress-susceptible animals had a high amylophosphorylase and ATPase activity. It was postulated that such fibers are important in the drastic post-mortem muscle behavior in stress-susceptible animals and may represent the characteristic which causes muscle to become PSE.
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