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Colocalization studies of DTTDO-NMe3+ and DAPI in A431 cells. DTTDO-NMe3+ concentration, 10 μM; incubation time, 24 h. The DTTDO derivative was observed using TxRed filter (λex = 540–580, λDM = 595, λBA = 600–660), whereas DAPI was observed using DAPI filter (λex = 340–380, λDM = 400, λBA = 435–485). Scale bars, 100 μm.
