Which method randomly switches fluorophores between dark and fluorescent states for high-precision localization?
STORM achieves super-resolution through stochastic photoswitching of organic cyanine dyes. Individual fluorophores randomly transition between dark and bright states so only sparse subset emits per frame. Precise Gaussian fitting of each blinking event localizes molecules with 10-30 nanometer accuracy. Iterative activation, imaging, and bleaching cycles over thousands of frames systematically reconstruct complete nanoscale architecture. This single-molecule localization strategy overcomes diffraction by temporal separation rather than optical narrowing, revealing detailed organization of micro
Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.