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. 1976 Oct 1;71(1):303–307. doi: 10.1083/jcb.71.1.303

Cytochalasin B inhibits actin-related gelation of HeLa cell extracts

PMCID: PMC2109735  PMID: 977652

Abstract

When the 100,000 g supernatant fraction (extract) of HeLa cells lysed in a buffer containing sucrose, ATP, DTE, EGTA, imidazole, and Triton X- 100 is incubated at 25 degrees C, it gels, and actin and a HMWP are progressively enriched in the extract and in gel isolated from extract. CB (greater than or equal to 0.25 muM) inhibits gelation and specifically lowers the concentrations of actin and the HMWP in the fraction which sediments at 100,000 g after incubation. These results indicate that actin and HMWP are partly disaggregated by cytochalasin treatment, and thus that their aggregation is related gelation. Inasmuch as previous results showed that actin is present and HMWP is enriched in the plasma membrane fraction of HeLa cells, the results also point to a possible relation between plasma membrane-associated gel and in vivo effects of CB.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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