منابع مشابه
Adapting ChER for the recognition of chemical mentions in patents
ChER (Chemical Entity Recogniser) is a pipeline of natural language processing tools optimised for the recognition of chemical names in scientific abstracts. It formed the basis of our submissions to the previous edition of the CHEMDNER track in BioCreative IV, and was one of the top-performing systems both for the chemical document indexing (CDI) and chemical entity mention recognition (CEM) s...
متن کاملRole of CheB and CheR in the complex chemotactic and aerotactic pathway of Azospirillum brasilense.
It has previously been reported that the alpha-proteobacterium Azospirillum brasilense undergoes methylation-independent chemotaxis; however, a recent study revealed cheB and cheR genes in this organism. We have constructed cheB, cheR, and cheBR mutants of A. brasilense and determined that the CheB and CheR proteins under study significantly influence chemotaxis and aerotaxis but are not essent...
متن کاملRole for cheR of Vibrio fischeri in the Vibrio-squid symbiosis.
Upon hatching, the Hawaiian squid Euprymna scolopes is rapidly colonized by its symbiotic partner, the bioluminescent marine bacterium Vibrio fischeri . Vibrio fischeri cells present in the seawater enter the light organ of juvenile squid in a process that requires bacterial motility. In this study, we investigated the role chemotaxis may play in establishing this symbiotic colonization. Pre...
متن کاملBinding and diffusion of CheR molecules within a cluster of membrane receptors.
Adaptation of the attractant response in Escherichia coli is attributable to the methylation of its transmembrane chemotactic receptors by the methyltransferase CheR. This protein contains two binding domains, one for the sites of methylation themselves and the other for a flexible tether at the C terminus of the receptor. We have explored the theoretical consequences of this binding geometry f...
متن کاملGenetic and molecular biological characterization of two homologous cheR genes from Leptospira interrogans.
The Leptospira interrogans genome encodes two copies of cheR genes and each of them is able to complement for the swarming defective phenotype of Escherichia coli cheR null mutant RP1254 to certain extent, while over-expression of either of them inhibits the swarming of the chemotactic wild-type E. coli strain, RP437. Therefore, both CheR1 and CheR2 ought to bear the methyltransferase activitie...
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ژورنال
عنوان ژورنال: Archéologie médiévale
سال: 2015
ISSN: 0153-9337,2608-4228
DOI: 10.4000/archeomed.6760