The sarcoplasmic reticulum is a network of tubules and cysternae surround ing the myofibrils
of striated muscle. The membrane of the sarcoplasmic reticulum can be isolated in vesicular …

Different forms of energy are interconverted in biological systems. For this purpose, the cell
uses phosphate compounds as the common currency of energy exchange [1]. The …

Calcium filling of sarcoplasmic reticulum vesicles in the steady state is greatly increased by
precipitation of lumenal calcium with oxalate. We find that low concentrations (1 m M) of P i …

Sarcoplasmic reticulum vesicles of rabbit skeletal muscle accumulate Ca 2+ at the expense
of ATP hydrolysis. The heat released during the hydrolysis of each ATP molecule varies …

Tonoplast-enriched vesicles isolated from maize (Zea mays L.) coleoptiles and seeds
synthesize ATP from ADP and inorganic phosphate (Pi) and inorganic pyrophosphate from …

Nucleotides encoding glutamate, glutamine, aspartate, or asparagine residues within the
stalk sector of the sarcoplasmic reticulum Ca 2+-ATPase were altered by oligonucleotide …

A thermodynamic cycle for catalysis of calcium transport by the sarcoplasmic reticulum
ATPase is described, based on equilibrium constants for the microscopic steps of the …

Leopoldo de Meis,* Orlando Bonifacio Martins,* and Elias Walter Alves* abstract: The aim of
thisstudy was to test the hypothesis that in the Ca2+-ATPase of sarcoplasmic reticulum the …

The vesicular fragments of the membranes of the sarcoplasmic reticulum are a preparation
of biological membranes exceptional in simplicity for studying the transformation of chemical …

In comparative experiments with Ca 2+ ATPase in native sarcoplasmic reticulum vesicles
and reconstituted proteoliposomes, we find that a variable stoichiometry of Ca 2+ or Sr 2+ …