Autofluorescence during spourulation. Autofluorescence is very low during sporulation. Fluorescence emission signals for wild type (left) and fluorescent fusion strains (right) are shown for the GFP and mCherry channels at the time (hours) after resuspension into sporulation medium. The images have been equalised so that the fluorescence through the GFP channels is identical for the wild type and fluorescent fusion strain, and likewise in the mCherry channel. The cells for the GFP and mCherry fluorescent fusions are the same as those shown in Figure 2 for reference.