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What mineral is needed for the active site on actin to be exposed?
Wiki User
∙ 11y ago
calcium
Wiki User
∙ 11y ago
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What molecule covers active site on globular actin?
Tropomyosin. When Ca2+ ion is not bound to troponin, tropomyosin covers the active site on G(lobular) actin. Answered by, DLT.
When the sarcomere is at rest what is covering the active sites on actin?
Troponin
Myosin cross bridges attach to active sites of?
actin (thin) filaments
Do myosin filaments outnumber actin filaments in skeletal muscles?
No. 2 to active
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
What mineral is needed to allow actin and myosin to interact?
In order for myosin to connect to actin's active sites, Ca ions must be released from storage in the sarcoplasmic reticulum into the sarcoplasm. A nerve impulse stimulates the release of Ca ions from the sarcoplasmic reticulum. Once the Ca ions are released into the sarcoplasm, they bind to troponin. Once they bind to troponin, troponin no longer is bound to tropomyosin. Tropomyosin is now no longer covering up actin's active sites, thus allowing myosin to attach to actin's active sites.
What is the actin status to begin cross bridge formation?
The actin binding sites are exposed
During muscle contraction myosin cross bridges attach to which active sites?
actin filaments
What is the name of the protein active in muscular contraction?
actin
What unlocks the active site of an actin molecule?
calcium
What molecule covers active site on globular actin?
Tropomyosin. When Ca2+ ion is not bound to troponin, tropomyosin covers the active site on G(lobular) actin. Answered by, DLT.
When the sarcomere is at rest what is covering the active sites on actin?
Troponin
What is the function of tropomyosin?
The function of tropomyosin is to cover the active site on the G Actin or Actin, so nothing can stick to it, when muscle is at rest.
Is protein passive or active?
Some are passive (e.g. melanin) and some are active (e.g. actin, myosin).
Myosin cross bridges attach to active sites of?
actin (thin) filaments
Do myosin filaments outnumber actin filaments in skeletal muscles?
No. 2 to active
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
