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Live/Dead analysis of E. coli without any treatment (A and E) or incubated with protein 2 (B and F), metallacycle 1 (C and G), or assembly 3 (D and H) in the dark (A–D) or with 420-nm light (25 mW/cm2) irradiation for 15 min (E–H). Green (SYTO9 nucleic acid stain) indicates live E. coli, and red (propidium iodide) indicates dead E. coli. (Scale bars: 20 μm.)
