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Ricin, a plant‐derived toxin extracted from the seeds of Ricinus communis (castor bean plant), is one of the most toxic proteins known. Ricin's high toxicity, widespread availability, and ease of its extraction make it a potential agent for bioterrorist attacks. Most ricin detection methods are based on immunoassays. These methods may suffer from low efficiency in matrices containing interfering substances,...
The well-characterized virulence factors of Yersinia pestis the causative agent of plague are those encoded by the virulence plasmids. Previously we have isolated an attenuated Y. pestis transposon insertion mutant in which the chromosomal pcm gene was disrupted. The pcm gene is located within a putative stress response locus that includes the surE, nlpD, and rpoS genes. In this study, we investigated...
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