Journal: bioRxiv
Article Title: Fluorogenic speed-optimized DNA-PAINT probes enable super-resolution imaging of whole cells
doi: 10.64898/2026.03.23.710523
Figure Lengend Snippet: (a) FSPs (FSP1 and FSP2) integrate probe and docking site sequences from Speed-optimized DNA-PAINT probe SP with the fluorophore-quencher design from Fluorogenic DNA-PAINT probe FP. Grey letters indicate locations of single-nucleotide mismatches in FP. (b) Bleaching effect in DNA-PAINT imaging under widefield illumination (yellow area) with regular and fluorogenic probes. (c) DNA-PAINT imaging of 20-nm grid DNA origami demonstrating that SP loses its ability to resolve the grid structures going from TIRF to widefield, but FSPs can resolve the structure under widefield illumination ( Suppl. Fig. 3b ). Scale bars: 20 nm. (d-g) Comparison of binding kinetics (k on and 1/k off ), localization precision, and speed value measured on DNA origami (n=3 independent experiments for each probe, each value averaged over ∼2000 origami) (see Suppl. Fig. 3d-h for more). (h) Overall DNA-PAINT probe comparison.
Article Snippet: The Dragonfly was used in the BTIRF mode, applying an objective-type TIRF or widefield configuration with an oil-immersion objective (Nikon Instruments, Apo SR TIRF 60×, NA 1.49, Oil).
Techniques: Imaging, Comparison, Binding Assay