the.com/actin
The cell's scaffolding and muscle, rebuilding itself thousands of times a second.
means Actin is a protein that forms thin filaments inside cells, giving them shape, letting them move, and — bundled with myosin — powering muscle contraction.
from Named by the biochemists who isolated it from muscle tissue in the 1940s, the word is simply built from 'act' (Latin actus, 'a doing' or 'a driving') plus the chemical suffix '-in' used for proteins — a plain label for the molecule that does the acting in muscle movement, paired with its partner myosin.
- abundance
- One of the most abundant proteins in eukaryotic cells
- dual role
- Builds cell shape and powers muscle contraction with myosin
- ancient design
- Nearly identical in humans, yeast, and amoebas
- constant motion
- Filaments assemble and disassemble in seconds, not minutes