capping proteins

cap·ping pro·teins

proteins that bind to one end of actin filaments, preventing both addition and loss of actin monomers.
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References in periodicals archive ?
The length regulation of the thin filaments is carried out largely by the capping proteins, CapZ and tropomodulin (Tmod).
Two protein spots demonstrating reduced expression by HG, identified as the actin capping proteins, F-actin capping protein [beta]-subunit, and actin-like protein 3.