Difference Between Troponin and Tropomyosin
The troponin and tropomyosin differences are as follows:
Features |
Troponin |
Tropomyosin |
Definition |
Muscular cells contain a protein called troponin, which is crucial for muscular contraction. |
A protein called tropomyosin is present in the cytoskeleton of the cytoplasm. |
Composition |
Troponin C, Troponin T, and Troponin I are the three subunits that make up this complex. |
It is an alpha-helical protein with double strands and a coil structure. |
Function |
As a result of its binding with calcium, its structure changes. This reshaped form activates the myosin sites, which increases the contraction of muscles. This enables the contraction of muscles. |
To suppress muscle contraction, tropomyosin works by inhibiting the interaction between myosin heads and actin filaments. It restricts the muscle contraction. |
Calcium level |
It functions,when intracellular calcium levels are high. |
It functions when intracellular calcium levels are low. |
Present in |
Both skeletal and cardiac muscle cells include them. |
Both muscle and nonmuscle cells include them. |
Difference Between Troponin and Tropomyosin
The difference between Troponin and Tropomyosin lies in their roles within the muscle contraction process. Troponin and tropomyosin are regulatory proteins in muscles. Troponin regulates the binding of calcium ions to actin filaments, while Tropomyosin blocks the active sites on actin, preventing myosin binding.
They are found on the thin filaments of muscle cells that help muscles contract. While troponin facilitates muscle contraction, tropomyosin blocks muscle contraction. In this article, we will study the difference between Troponin and Tropomyosin in detail.
Table of Content
- What is Troponin?
- What is Tropomyosin?
- Relation Between Troponin and Tropomyosin
- Difference Between Troponin and Tropomyosin
- Conclusion – Difference between Troponin and Tropomyosin
- Difference Between Related Links
- FAQs on Difference Between Troponin and Tropomyosin
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