Fig 6. SpoIVB2 is required for cortex synthesis.
Day 6 sporulating cultures were prepared for TEM. A field of view image is shown for the C. difficile ΔspoIVB2 mutant while the remainder of the images are zoomed into the sporulating cell / spore. The coat layer is indicated with a white arrow, while the cortex layer is indicated with a black arrow. pEV indicates an empty plasmid within the strain.