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Old 07-17-2014
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Default ATP usage in Actin Myosin contraction

I am having doubt reg How many ATPs are consumed per cycle of myocyte contraction....I think its 2 ATP per cycle...My understanding is

1.One ATP is used for detachment of Myosin head and hydrolysis of that ATP into ADP and Pi reactivates the myosin head for the next cycle

2.Second ATP is used in pumping back the calcium ions into sarcoplasmic reticulum....this leads to relaxation of the sarcomere..

Can some tell me if i am correct
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