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There are two functionally different alleles of the Helicobacter pylori vacA gene, which code for proteins with different in target cell specificity. The alleles (m1 and m2) differ by approximately 50% in amino acid sequence in a 300 amino acid region, the m-region, which determines specificity. An analysis of partial likelihood anomalies in a set of eight Chinese and six Western vacA genes revealed...
VacA, the vacuolating cytotoxin secreted by Helicobacter pylori, is believed to be a major causative factor in the development of gastroduodenal ulcers. This toxin causes vacuolation of cultured cells and it has recently been found to form anion-selective channels upon insertion into planar bilayers as well as in the plasmamembrane of HeLa cells. Here, we identify a series of inhibitors of VacA channels...
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