Extended Data Fig. 3: Negative aerotactic behaviour of ciliate hosts exposed to varying concentrations of oxygen.
From: Anaerobic endosymbiont generates energy for ciliate host by denitrification
a, Schematic of a two-capillary experimental setup that allows for simultaneous oxygen measurements and ciliate tracking. b, Reference experiment showing the positioning of ciliates under anoxic conditions on the basis of 3 measurements after 0 s, 300 s and 600 s. The positioning is expressed as probability density and is defined as the percentage of the ciliates at a specific distance to the anoxic bubble. c, Chemotaxis experiments in which ciliates were exposed to a gradient of increasing oxygen concentration. These data were extracted from the video in Supplementary Video 2 with simultaneous ciliate tracking and oxygen concentration determination.
