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Tropomyosin. When Ca2+ ion is not bound to troponin, tropomyosin covers the active site on G(lobular) actin. Answered by, DLT.
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∙ 11y ago
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What molecule is connected to the Z line?
titin
What regulatory proteins can be found on an actin molecule?
Tropomyosin and Troponin
When the sarcomere is at rest what is covering the active sites on actin?
Troponin
What mineral is needed for the active site on actin to be exposed?
calcium
Myosin cross bridges attach to active sites of?
actin (thin) filaments
What shape is the protein actin?
Actin is a globular molecule
What unlocks the active site of an actin molecule?
calcium
What blocks the myosin binding sites on the actin molecule preventing cross bridge formation?
The tropomyosin molecule blocks the active sites of the actin. Troponin is a molecule that is bound to the tropomyosin. Troponin needs CA+ (calcium ions) to bind to it in order to rotate the tropomyosin molecule and expose the actin molecules for the myosin heads to interact for muscle contraction.
What molecule is connected to the Z disc?
Actin
Are actin and myosin structural proteins?
In addition to providing structural support, actin filaments are involved in movement when they interact with the specialized protein myosin. Myosin is a motor protein that converts the chemical energy in ATP into the mechanical work of movement. The interaction between actin and myosin that produces movement: When ATP binds to themyosin and is then hydrolyzed to ADP, the "head" region of the myosin molecule binds to the actin filament on the slide. The movement of this protein causes the ctin filament to slide. This type of movement is analogous to a line of people who are passing along a long log or pole, the people are myosin molecules; the log is the is the actin.
What is a molecule found inside the microfilament?
actin and myosin?
What molecule is connected to the Z line?
titin
The thin myofilament of the skeletal muscles is made o?
The thin myofilament of skeletal muscles is made of the globular protein called actin.
During muscle contraction myosin cross bridges attach to which active sites?
actin filaments
What regulatory proteins can be found on an actin molecule?
Tropomyosin and Troponin
What is the name of the protein active in muscular contraction?
actin
An energy molecule that facilitates the sliding motion of actin and myosin?
ATP
