2POX:
reference: Structural basis for reversible photoswitching in Dronpa., Andresen M, Stiel AC, Trowitzsch S, Weber G, Eggeling C, Wahl MC, Hell SW, Jakobs S, Proc Natl Acad Sci U S A. 2007 Aug 7;104(32):13005-9. Epub 2007 Jul 23. PMID: 17646653

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