Actin can exist in monomeric form as G-actin (globular actin) or can form filaments (F-actin, filamentous actin) and mediates multiple cellular functions, including cell migration, contractility ...

revealing a mechanism for direct regulation of actin filament formation. Using single-molecule force spectroscopy, the authors demonstrate that proline isomerization and cysteine-mediated ...

Earthworms often form a cluster, from which they can barely free themselves. A similarly active, writhing structure forms ...