a minor basal level of actin assembly with numerous nucleation sites in unfertilized eggs and a tremendous but localized assembly of microfilaments surrounding the sperm during incorporation , followed by a massive global microfilament assembly event to elongate the fertilized egg microvilli resulting later in the reorganization of these microfilaments to produce the forces necessary for cytokinesis , highlight the utility of the study of sea urchin eggs at fertilization for understanding actin-membrane interactions .
C0025979
microfilament
C0001271
actin