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Blebbistatin crystallization within a perfused heart—the “disco heart” effect. Top: blebbistatin crystals have accumulated within the vasculature but are not visible unless the tissue is illuminated with UV light (365 ± 5 nm). Bottom: the size of the blebbistatin crystals, both in the vasculature (left) and in solution (right). Reprinted with permission. [Swift 2012, Pflugers Arch (76)].
