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At a time when the cells are observed to extend many ruffles or lamellipodia from their surface, the fraction of the cellular actin present in a monomeric form is decreased by about 25% as assayed by the ability of the G\u2010actin to inhibit DNAase. These changes are temporally correlated with an increase in the staining by nitrobenzooxadiazole (NBD)\u2010phallacidin, a probe that binds F\u2010actin selectively. The NBD\u2010phallacidin staining is observed in the surface ruffles. When the peptide concentration is decreased by addition of a tenfold excess of buffer, cells withdraw their surface ruffles and form blebs. These changes correlate with an increase in the G\u2010actin levels detected with the DNAase inhibition assay. An increase in phosphorylation of the 20,000\u2010dalton light chain of myosin is also observed in leukocytes stimulated by addition of chemotactic peptide. These observations of changes in cytoskeletal proteins of PMNs provide a beginning for further studies on the regulation of cell motility by chemotactic factors.<\/jats:p>","DOI":"10.1002\/cm.970030406","type":"journal-article","created":{"date-parts":[[2005,2,23]],"date-time":"2005-02-23T23:47:16Z","timestamp":1109202436000},"page":"349-361","source":"Crossref","is-referenced-by-count":96,"title":["Changes in cytoskeletal proteins of polymorphonuclear leukocytes induced by chemotactic peptides"],"prefix":"10.1002","volume":"3","author":[{"given":"Marcus","family":"Fechheimer","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sally H.","family":"Zigmond","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,2,4]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.bi.49.070180.004421"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/0014-4827(61)90337-8"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.bb.07.060178.002345"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.77.2.980"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1083\/jcb.79.3.846"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1083\/jcb.74.3.1032"},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0092-8674(78)90277-5"},{"key":"e_1_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.76.12.6376"},{"key":"e_1_2_1_10_1","doi-asserted-by":"crossref","first-page":"8011","DOI":"10.1016\/S0021-9258(19)70594-8","article-title":"Actin activation of Ca2+\u2010sensitive Mg2+\u2010ATPase activity of Acanthamoeba Myosin II is enhanced by dephosphorylation of its heavy chains","volume":"255","author":"Collins J. 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