Choline: high-affinity uptake by rat brain synaptosomes.
Science
; 178(4061): 626-8, 1972 Nov 10.
Article
em En
| MEDLINE
| ID: mdl-5086398
ABSTRACT
Synaptosomes from rat brain accumulate choline by two kinetically distinct processes, a high-affinity uptake system [Michaelis constant (K(m)) = 1 x 10(-6)M], and a low-affinity system (K(m) = 9 x 10(-5)M). The high-affinity uptake system requires sodium, and is associated with considerable formation of acetylcholine. The low-affinity uptake system is less dependent on sodium, and does not appear to be associated with a marked degree of acetylcholine formation. The high-affinity choline uptake appears to represent selective choline accumulation by cholinergic neurons.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vesículas Sinápticas
/
Gânglios da Base
/
Colina
/
Terminações Nervosas
Limite:
Animals
Idioma:
En
Revista:
Science
Ano de publicação:
1972
Tipo de documento:
Article