DNA photocleavage of pUC19 DNA (20 μM bases) dosed with metal complex (MC) 1 (a), 2 (b), or 3 (c) and visible light (14 J·cm−2). Gel mobility shift assays employed 1% agarose gels (0.75 μg·mL−1 ethidium bromide) electrophoresed in 1× TAE at 9 V·cm−1 for 30 min. Lane 1, DNA only (-hν); lane 2, DNA only (+hν); lane 3, 5 μM MC (+hν); lane 4, 20 μM MC (+hν); lane 5, 40 μM MC (+hν); lane 6, 60 μM MC (+hν); lane 7, 80 μM MC (+hν); lane 8, 100 μM MC (+hν); lane 9, 100 μM MC (-hν). Light treatments were broadband visible light (14 J cm−2, 7.8 mW cm−2).