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Cholinergic synaptic vesicles were purified from Torpedo electric organ to near morphological homogeneity. They were isolated in a K+ environment. A method is described for the preparation of concentrated synaptic vesicles that allows uptake studies by conventional techniques. An ATP-Mg-dependent calcium uptake associated with synaptic vesicles is characterized. The uptake system transports calcium against a high concentration gradient. The maximum accumulation rate is obtained for the calcium, Mg++ and ATP concentrations likely to be found in the nerve terminal cytoplasm. It is suggested that synaptic vesicles are implicated in the removal of the calcium entering the nerve terminal during synaptic activity.
M Israël, and
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F M Meunier, and
N Morel, and
P Frachon, and
B Lesbats
May 1980,
Biochemical and biophysical research communications,
M Israël, and
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N Morel, and
P Frachon, and
B Lesbats
October 1980,
Proceedings of the National Academy of Sciences of the United States of America,
M Israël, and
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J Marsal, and
F M Meunier, and
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B Lesbats
October 1978,
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July 1988,
Proceedings of the National Academy of Sciences of the United States of America,
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Journal of neurochemistry,
M Israël, and
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P Frachon, and
B Lesbats
September 1980,
Biochemistry,
M Israël, and
R Manaranche, and
J Marsal, and
F M Meunier, and
N Morel, and
P Frachon, and
B Lesbats
January 1978,
Neuroscience,
M Israël, and
R Manaranche, and
J Marsal, and
F M Meunier, and
N Morel, and
P Frachon, and
B Lesbats
July 1980,
Journal of neurochemistry,
M Israël, and
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J Marsal, and
F M Meunier, and
N Morel, and
P Frachon, and
B Lesbats
August 1990,
Brain research,
