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Fig. 2. Confocal microscopic images of (A–D) live susceptible S. aureus (ATCC 25923) and (E–H) susceptible S. pneumoniae (ATCC 33400) labelled with (A and E) roxi-C4-Tz-DMACA 10 (10 μM); (B and F) Syto-9 (green nucleic acid dye, 5 μM); (C and G) FM4-64FX (red membrane dye, 5 μg mL−1); and (D and H) overlaid.