Structural differentiation of actin network in lamellipodium. Electron micrograph of Xenopus fibroblast after unprotected extraction without polyethelene glycol and phalloidin. Actin network at lamellipodial rear disassembled in the course of unprotected extraction, whereas front zone remained as dense as in control cells (CIL 24801). Image corresponds to Figure 6f 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).
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