Nature Reviews Neuroscience 18, 713–726 (2017)

In Box 1 of this article, the sentence “Actin filaments are approximately 8 nm in diameter, are composed of heterodimers of α-actin and β-actin (known as G-actin) and require ATP for polymerization” should have read “Actin filaments are approximately 8 nm in diameter, are composed of actin monomers (known as G-actin) and require ATP for polymerization”. The article has been corrected in the online version.