Keywords: حلقه انقباض; CR; contractile ring; F-actin; filamentous actin; MR; midbody ring; ActBD; actin-binding domain; GFP; green fluorescent protein; LatA; Latrunculin A; dsRNAs; double-stranded RNAs; UTR; untranslated region; ABS; actin-binding site; EM; electron microscopy;