Structural differentiation of actin network in lamellipodium. Electron micrograph of Xenopus fibroblasts after regular extraction in the presence of polyethelene glycol (PEG) and phalloidin. While the actin network in the front zone of these cels remains dense, the actin network at the lamellipodial rear disassembled in the course of unprotected extraction (CIL 24800). Image corresponds to Figure 6c from J Cell Biol. 1999 May 31;145(5):1009-26.
Procedures for detergent extraction, immunostaining, S1 decoration, light, and EM were described previously (Svitkina et al., 1995, 1996, 1997;Verkhovsky et al., 1995; Svitkina and Borisy, 1998).