The actin filament bundling protein alpha-actinin-4 actually suppresses actin stress fibers by permitting actin turnover.

Kemp JP Jr, Brieher WM
J Biol Chem. 2018 Sep 14;293(37):14520-14533. doi: 10.1074/jbc.RA118.004345. Epub 2018 Jul 26. (Link opens in a new window) PubMed (Link opens in a new window) Article

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