2VVI:
reference: Structural characterization of IrisFP, an optical highlighter undergoing multiple photo-induced transformations., Adam V, Lelimousin M, Boehme S, Desfonds G, Nienhaus K, Field MJ, Wiedenmann J, McSweeney S, Nienhaus GU, Bourgeois D, Proc Natl Acad Sci U S A. 2008 Nov 25;105(47):18343-8. Epub 2008 Nov 18. PMID: 19017808

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