Human-Physiologylocomotion-And-Movement-2
| Characteristic | Actin | Myosin |
|---|---|---|
| Type of Protein | Thin filamentous protein | Thick filamentous protein |
| Structure | Helical filaments formed by G-actin | Molecules with elongated tail and globular head regions |
| Function in Muscle Contraction | Provides attachment sites for myosin | Generates force and interacts with actin during muscle contraction |
| Arrangement in Sarcomeres | Forms thin filaments within sarcomeres | Arranged between actin filaments in sarcomeres |
| Role in Sliding Filament Theory | Participates in the sliding of actin filaments past myosin filaments | Undergoes conformational changes to generate force and propel actin |
| Cellular Functions | Component of the cytoskeleton, involved in cell motility, cytokinesis, and intracellular transport | Primarily associated with muscle contraction but also present in non-muscle cells for various cellular processes |
| Location | Present in eukaryotic cells, especially muscle cells | Present in eukaryotic cells, primarily muscle cells, but also found in other cell types |
| Interaction | Binds to myosin heads during muscle contraction | Binds to actin and undergoes a series of conformational changes during muscle contraction |
| Characteristic | Actin | Myosin |
|---|---|---|
| Type of Protein | Thin filamentous protein | Thick filamentous protein |
| Structure | Helical filaments formed by G-actin | Molecules with elongated tail and globular head regions |
| Function in Muscle Contraction | Provides attachment sites for myosin | Generates force and interacts with actin during muscle contraction |
| Arrangement in Sarcomeres | Forms thin filaments within sarcomeres | Arranged between actin filaments in sarcomeres |
| Role in Sliding Filament Theory | Participates in the sliding of actin filaments past myosin filaments | Undergoes conformational changes to generate force and propel actin |
| Cellular Functions | Component of the cytoskeleton, involved in cell motility, cytokinesis, and intracellular transport | Primarily associated with muscle contraction but also present in non-muscle cells for various cellular processes |
| Location | Present in eukaryotic cells, especially muscle cells | Present in eukaryotic cells, primarily muscle cells, but also found in other cell types |
| Interaction | Binds to myosin heads during muscle contraction | Binds to actin and undergoes a series of conformational changes during muscle contraction |
