Use the actin probes in fixed cells (Acti-stain Fluorescent Phalloidins) or live cells (SiR-Actin) to visualise the exquisite detail of the cytoskeleton.  For example: Rho activators such as  Cat No. CN03 create actin stress fibers ( Image 1) whereas the Rac activator (CN04) causes peripheral actin staining in ruffles as shownin Image 2.  Images 3 and 4 depict the Sir-Actin probe in live cells