Quelltext der Seite Aktin, Aktinfäden/en

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Actin is a fiber [[Protein/en|protein]] of the muscle[[Zelle/en|cell]] and the cytoskeleton of the [[Nervenzellen/en|nerve cells]]. 

At critical concentrations of [[Adenosine Triphosphate, ATP/en|ATP]] and actin, polymerization produces helical actin filaments, which are part of the contractile apparatus of muscle cells.

https://en.wikipedia.org/wiki/Actin