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- Actin | Definition Function | Britannica
Actin, protein that is an important contributor to the contractile property of muscle and other cells In muscle, two long strands of actin molecules are twisted together to form a thin filament, bundles of which alternate with bundles of myosin The temporary fusion of actin and myosin results in muscle contraction
- Actin Structure and Function - PMC
Actin is the most abundant protein in most eukaryotic cells It is highly conserved and participates in more protein-protein interactions than any known protein These properties, along with its ability to transition between monomeric (G-actin) and
- Actin and Myosin - Biology Dictionary
Actin and myosin are both proteins that are found in every type of muscle tissue Thick myosin filaments and thin actin filaments work together to generate muscle contractions and movement Myosin is a type of molecular motor and converts chemical energy released from ATP into mechanical energy
- Cell - Actin Filaments, Cytoskeleton, Proteins | Britannica
Cell - Actin Filaments, Cytoskeleton, Proteins: Actin is a globular protein that polymerizes (joins together many small molecules) to form long filaments Because each actin subunit faces in the same direction, the actin filament is polar, with different ends, termed “barbed” and “pointed ” An abundant protein in nearly all eukaryotic cells, actin has been extensively studied in muscle
- PDB-101: Molecule of the Month: Actin
Actin filaments are continually built and broken down as the needs of the cell change from moment to moment In special cases, such as muscle actin or the actin bundles in microvilli, a collection of specialized actin-binding proteins stabilize the filament, forming a more permanent structure
- Actin and Actin-Binding Proteins - PMC
Organisms from all domains of life depend on filaments of the protein actin to provide structure and to support internal movements Many eukaryotic cells use forces produced by actin polymerization for their motility, and myosin motor proteins use
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