Extended Data Fig. 8: Visual IPTG readout is robust to natural water samples.
From: Engineered bacterial swarm patterns as spatial records of environmental inputs

a. Proposed controls for natural samples. b. Representative images of colonies grown with either river water only or river water with 5 mM IPTG throughout the plate. c. Representative images of colonies grown with natural water sample spots with and without IPTG (1 M) as indicated. Schematic indicates location of natural water droplets on plate relative to colony inoculum.