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vesicle production in neuronal end plates

S H Young, I Chow
The traditional view that quantal release of neurotransmitter results from the fusion of transmitter-containing vesicles with the neuronal membrane has been recently challenged. Although various alternative mechanisms have been proposed, a common element among them is the release of cytoplasmic transmitter, which, in one view, could occur through large conductance channels on the presynaptic membrane. Six nerve-muscle cell pairs were examined with a whole-cell patch clamp for the presence of such channels that are associated with the production of miniature end-plate potentials...
December 18, 1987: Science
P Hambleton
The neurotoxins produced by Clostridium botulinum are the most potent acute toxins known and are the causative agents of the neuroparalytic disease botulism. The toxins act primarily at peripheral cholinergic synapses by blocking the evoked release of the neurotransmitter acetylcholine. There are seven distinct serotypes of toxin. All are polypeptides of Mr about 150 kDa that have similar structure and pharmacological action. In their most active forms the toxins exist as dichain molecules in which a heavy (H) chain is linked by disulphide bonding to a light (L) chain...
January 1992: Journal of Neurology
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