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. 1981 Oct 15;200(1):11–15. doi: 10.1042/bj2000011

Characteristics of sarcoplasmic reticulum from normal and denervated rat skeletal muscle.

G N Palexas, N Savage, H Isaacs
PMCID: PMC1163496  PMID: 6120692

Abstract

Denervation of rat skeletal muscle produces after 14 days a decrease in Ca2+ uptake of a heterogeneous population of sarcoplasmic-reticulum vesicles, when measured in the presence of oxalate. The Mg2+-dependent ATPase (Ca2+-independent) activity increased after the same period and the Ca2+ + Mg2+-dependent ATPase activity decreased. Concomitant with these changes, there was an increase in vesicle size and calcium content. The observations are discussed in terms of changes in altered membrane structure, manifested in the shift of the equilibrium of the ATPase from an enzyme involved in calcium transport to a phosphoenzyme giving rise to an increase in the Mg2+-dependent ATPase activity.

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Selected References

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