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This regulation of the actin cytoskeleton governs cell migration: cells need to polymerize and depolymerize their actin to crawl, divide, and close wounds

They're complementary, not redundant

By MATTHEW PERRONE, AP Health Writer WASHINGTON (AP) The Food and Drug Administration will hold a meeting this summer to consider easing restrictions on more than a half dozen peptide injections, a group of unapproved therapies that have become popular among wellness influencers, fitness gurus and celebrities

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American Academy of Neurology 2012)