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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1998.1
- 수록면
- 233 - 238 (6page)
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Certain basic characteristics of choline uptake in nerve terminals were studied with synaptosomes from rat hippocampus. Synaptosomal $[^3H]$-choline uptake was clarified as specific and high affinity by low Km value(2.2 uM), Na+-dependency and high sensitivity to hemicholinium-3, a competitive inhibitor of choline uptake. Choline uptake into synaptosomes was linearlys related to Na+ concentration and membrane potential. Extracellular Ca2+ modulated the choline uptake, but probably not through increase of intracellular $Ca^{2+}$, because this modulation was not affected the by high $K^+$-depolarization. EGTA (2mM) added for $Ca^{2+}$-free condition had a peculiar effect of decreasing choline uptake. These results suggest that Ca2+ may play an important role in regulating the metabolism of acetylcholine in the nerve terminals directly through the increase of acetylcholine release.
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