Question
Write the difference between:
Actin and Myosin
Actin and Myosin
| S. No. | Actin | Myosin |
| 1. | Actin filaments are thin. | Myosin filaments are thick. |
| 2. | Actin is a protein with a lower molecular weight. (Molecular weight: 60,000) | Myosin is a protein with a higher molecular weight. (Molecular weight: 500,000) |
| 3. | Actin's molecule is in a globular G-protein form. | Myosin molecule's shape is similar to a tadpole. |
| 4. | G-actin units polymerize into F-actin (Fibrous actin) in the presence of salt and ATP. | Myosin protein is divided by the proteolytic enzyme trypsin into two parts-(i) Heavy meromyosin and (ii) Light meromyosin. |
| 5. | Calcium is found in actin filaments as Calcium Actinate, with four Cat ions in one unit. | Myosin filaments contain Magnesium Myosinate, with one Mgt ion in one unit. |
| 6. | Each actin filament is surrounded by three myosin filaments. | Each myosin filament is surrounded by six actin filaments. |
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| Column I | Column II | ||
| a. | Chlamydomonas | i. | Moss |
| b. | Cycas | ii. | Pteridophyte |
| c. | Selaginella | iii. | Algae |
| d. | Sphagnum | iv. | Gymnosperm |