Figure 242

Distribution of actin filaments in a human fibroblast in culture. The cell was stained with an actin-specific antibody conjugated with the dye fluorescein. The antigen-antibody reaction, performed directly in the culture, results in localization of the actin. The actin filaments organized in linear bundles fluoresce and thus show their distribution in this nonmigrating cell. (Courtesy of Dr. Elias Lazarides.)

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