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Binding sites on the actin molecules are covered by troponin and?
muscle that produces a give movement
What triggers the binding of myosin to actin?
Calcium ions bind to troponin and change its shape.
The binding of calcium to which molecule causes the myosin binding sites to be exposed?
Troponin binds to the Calcium ions to expose the actin to the myosin heads.
Myosin contains two binding sites for what two molecules?
ATP (--> ADP+Pi) and actin
What is the site of oxygen binding on hemoglobin?
You have Iron atoms in hemoglobin. This atom is the binding site for oxygen in case of hemoglobin.
Sliding filament model which proteinS have a calcium binding site?
The actin filaments have a Ca+2 binding site.
What molecule has a binding site for myosin heads?
Myosin heads bind to the actin binding site, and also has a part where ATP binds
What is the actin status to begin cross bridge formation?
The actin binding sites are exposed
What specifically is cross bridge?
myosin binding to actin
How does removal of the calcium ions affect the filaments?
Troponin complex will return to its normal configuration and cover the actin binding site on tropomyosin thus preventing further interaction between the actin and myosin filaments, and contraction ends.
What are thin filament made of?
Assuming that you're talking about the thin filament of a muscle fiber then its made of actin, troponin, tropomyosin, and a binding site for a calcium ion.
The ability of myosin to interact with actin is regulated by the binding of?
Ca2+ to troponin
Active sites on the actin become available for binding when?
C: Calcium binds to troponin. The troponin is a filament in the actin strand, and the active site needs to be uncovered so that the myosin head can bond and therefore pull the muscle to contract it.
What muscle cell protein covers the myosin binding sites on actin fimlaments?
tropomyosin
What blocks the binding sites on actin?
TROPOMYOSIN MOLECULES ( troponin hold the tropomyosin in place)
Binding sites on the actin molecules are covered by troponin and?
muscle that produces a give movement
What triggers the binding of myosin to actin?
Calcium ions bind to troponin and change its shape.
