Fig. 1.
Electron micrographs of strain SLSR-1. a Scanning electron micrograph of sulfate-grown cells. b Thin section transmission micrograph of sulfate-grown cells showing presence of internal membranes (M-labeled arrow) and granular inclusions (G-labeled arrow). c Thin section of arsenate-grown cells showing presence of an internal daughter cell located near the node between larger cells (D-labeled arrow)