Difference Between Actin and Myosin
The major difference between actin and myosin are given below:
Difference |
Actin |
Myosin |
|---|---|---|
| Function |
The majority of eukaryotic cells include actin, a group of globular proteins that contributes to the body’s structure, form, and motion. |
The motor proteins known as myosin are the building blocks of muscle fiber contraction. |
| Produced by |
Troponin, tropomyosin, and actin proteins make up the filaments. |
Meromyosin and myosin make up the filament. |
| Location |
The sarcomere’s A and I bands both contain actin proteins. |
Only the sarcomere A bands have myosin proteins. |
| Filament size |
A thin and short filament is formed by actin |
A thick and long filament is formed by myosin |
| Filament Quantity |
The quantity of actin filaments is huge. |
There are six actin filaments for every myosin filament. |
| Surface |
The actin’s surface is smooth. |
The myosin’s surface is rough. |
| Ends |
In actin, both ends are attached to the Z-line, with one end being free. |
In myosin, both ends are free. |
| Sliding |
When the muscle contracts, actins slide into the H-zone. |
Myosin remains stable during contraction, with no sliding |
Difference Between Actin and Myosin
The difference between actin and myosin lies in their structure and function within muscle cells. Actin forms thin filaments while myosin forms thick filaments, and together they interact for muscle contraction. Each type of muscle tissue contains the proteins myosin and actin. In this article, we will cover the difference between actin and myosin in detail.
Difference between Actin and Myosin
Table of Content
- What is Actin?
- What is Myosin?
- Difference Between Actin and Myosin
- Similarities Between Actin and Myosin
- Conclusion – Difference Between Actin and Myosin
- FAQs on Difference Between Actin and Myosin