calcium is needed to attach to the tropomyosin on the actin active sites, which causes it to change shape and expose the actin active sites.
ATP is needed to attach to the myosin cross bridges so that these can attach to the actin active sites and and then power storke, Another ATP molecule is then needed to detach the myosin from the actin and allow the process to continue.
When no calcium is present, the muscle relaxes and the troposmyosin moves back to original position over the actin active sites. Love Emma and Nicole. :P
2 comments:
calcium is needed to attach to the tropomyosin on the actin active sites, which causes it to change shape and expose the actin active sites.
ATP is needed to attach to the myosin cross bridges so that these can attach to the actin active sites and and then power storke, Another ATP molecule is then needed to detach the myosin from the actin and allow the process to continue.
When no calcium is present, the muscle relaxes and the troposmyosin moves back to original position over the actin active sites.
Love Emma and Nicole. :P
Another excellent answer.
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