The cytoskeleton.
D000199:Actins / Q000032:analysis; D000818:Animals; D002478:Cells, Cultured; D003599:Cytoskeleton / Q000032:analysis / Q000648:ultrastructure*; D005455:Fluorescent Antibody Technique; D006801:Humans; D008854:Microscopy, Electron; D008870:Microtubules / Q000032:analysis / Q000648:ultrastructure*; D008871:Microvilli / Q000648:ultrastructure
D000199:Actins