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dc.contributor.authorPohl, Oliver-
dc.contributor.authorHintsche, Marius-
dc.contributor.authorAlirezaeizanjani, Zahra-
dc.contributor.authorSeyrich, Maximilian-
dc.contributor.authorBeta, Carsten-
dc.contributor.authorStark, Holger-
dc.description.abstractMany bacteria perform a run-and-tumble random walk to explore their surrounding and to perform chemotaxis. In this article we present a novel method to infer the relevant parameters of bacterial motion from experimental trajectories including the tumbling events. We introduce a stochastic model for the orientation angle, where a shot-noise process initiates tumbles, and analytically calculate conditional moments, reminiscent of Kramers-Moyal coefficients. Matching them with the moments calculated from experimental trajectories of the bacteria E. coli and Pseudomonas putida, we are able to infer their respective tumble rates, the rotational diffusion constants, and the distributions of tumble angles in good agreement with results from conventional tumble recognizers. We also define a novel tumble recognizer, which explicitly quantifies the error in recognizing tumbles. In the presence of a chemical gradient we condition the moments on the bacterial direction of motion and thereby explore the chemotaxis strategy. For both bacteria we recover and quantify the classical chemotactic strategy, where the tumble rate is smallest along the chemical gradient. In addition, for E. coli we detect some cells, which bias their mean tumble angle towards smaller values. Our findings are supported by a scaling analysis of appropriate ratios of conditional moments, which are directly calculated from experimental data.en
dc.description.sponsorshipDFG, 87159868, GRK 1558: Kollektive Dynamik im Nichtgleichgewicht: in kondensierter Materie und biologischen Systemenen
dc.subject.ddc610 Medizin und Gesundheiten
dc.subject.otherbacterial motionen
dc.subject.otherstochastic modelen
dc.subject.otherE. colien
dc.subject.otherPseudomonas putidaen
dc.subject.othercell trackingen
dc.titleInferring the Chemotactic Strategy of P. putida and E. coli Using Modified Kramers-Moyal Coefficientsen
tub.publisher.universityorinstitutionTechnische Universität Berlinen
dcterms.bibliographicCitation.journaltitlePLOS Computational Biologyen
dcterms.bibliographicCitation.originalpublisherplaceSan Francisco, Calif.en
dcterms.bibliographicCitation.originalpublishernamePublic Library of Science (PLoS)en
tub.affiliationFak. 2 Mathematik und Naturwissenschaften » Inst. Theoretische Physik » FG Statistische Physik weicher Materie und biologischer Systemede
Appears in Collections:Technische Universität Berlin » Publications

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