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The study addressed the functional link between remodelling of the actomyosin cytoskeleton in pancreatic β-cells and the regulation of insulin secretion. Confocal microscopy revealed that myosin heavy chain (MHC) IIA co-localized very well with filamentous (F)-actin in RINm5F cells but MHCIIB did not. Subcellular localization of MHCIIB was not altered by stimulation with 30 mM KCl (which evokes Ca...