How to Use actin in a Sentence

actin

noun
  • Myosins interact with actin filaments, which act as tracks along which molecules of myosin slide to produce movement and force.
    — Encyclopedia Britannica, 3 Apr. 2026
  • These footprints are rich in F-actin, a structural protein, and other adhesion proteins.
    — New Atlas, 16 Oct. 2025
  • Its inner space is dense with filaments of tubulin and actin, another protein that plays a similar skeletal role.
    — Veronique Greenwood, Quanta Magazine, 8 Sep. 2025
  • The head contains the ATP-binding site, a small converter region, and the actin-binding site.
    — Encyclopedia Britannica, 3 Apr. 2026
  • These bulges are made from actin, a protein that helps shape the cell, and they weren’t stopped by certain inhibitors, meaning the process may be similar to other cell activities.
    — Pranjal Malewar, New Atlas, 12 Dec. 2025
  • Doubrovinski and his team verified the role of actin by repeating the experiment using drugs that prevent the actin protein from assembling.
    — Anna Demming, Quanta Magazine, 10 Oct. 2025
  • In nonmuscle cells myosin is found in the cytoplasm, often associated with actin networks beneath the cell membrane or within the cell interior.
    — Encyclopedia Britannica, 3 Apr. 2026
  • In contrast, many nonmuscle myosins function as single molecules or small complexes that transport materials along actin filaments.
    — Encyclopedia Britannica, 3 Apr. 2026
  • Wada had begun experimenting with chloroplast motion back in the 1990s by looking into how the organelles move or anchor themselves by sprouting cytoskeletal fibers, including actin and microtubules.
    — Quanta Magazine, 4 May 2026
  • Proteomic analysis found 601 proteins in FOOD, including those involved in cell structure and adhesion (actin, tubulin, vinculin, and integrins).
    — New Atlas, 16 Oct. 2025
  • Pilhofer and the postdoctoral researcher Florian Wollweber, working with Schleper and a team of collaborators, revealed the presence of a protein very much like eukaryotic actin in an Asgard, called Candidatus Lokiarchaeum ossiferum.
    — Veronique Greenwood, Quanta Magazine, 8 Sep. 2025
  • In a paper in Physical Review Letters in June, Konstantin Doubrovinski and colleagues at the University of Texas Southwestern Medical Center explain it in terms of the production of actin, one of the most abundant proteins in these cells.
    — Anna Demming, Quanta Magazine, 10 Oct. 2025

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'actin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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