1.) What is the role of sarcoplasmic reticulum,myosin head and F actin during contration of striated muscles of human beings??? 2.) What is the role of Ca++ troponin during muscles contration?
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Myosins are a large superfamily of motor proteins that move along actin filaments, while hydrolyzing ATP. About 20 classes of myosinhave been distinguished on the basis of the sequence of amino acids in their ATP-hydrolyzing motor domains.The sarcoplasmic reticulum is a specialized type of smooth ER that regulates the calcium ion concentration in the cytoplasm of striated muscle cells.
It can be present as either a free monomer called G-actin (globular) or as part of a linear polymer microfilament called F-actin (filamentous), both of which are essential for such important cellular functions as the mobility and contraction of cells during cell division.
It can be present as either a free monomer called G-actin (globular) or as part of a linear polymer microfilament called F-actin (filamentous), both of which are essential for such important cellular functions as the mobility and contraction of cells during cell division.
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