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F1 atpase

F1 atpase

(Science: enzyme) Easily detachable cytosolic multi subunit component of the f1fo atpase.


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membrane permeability

If the plasma membrane was permeable to the same degree to both Na+ and K+, then they would not have to use the ATPase. And since the concentration gradient of both ions are of the same magnitude, then I would expect the ions to move across the membrane at pretty much the same ...

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by kolean
Wed Jul 22, 2009 2:33 am
 
Forum: Molecular Biology
Topic: membrane permeability
Replies: 2
Views: 208

cellular respiration???

... in the ETS to their ground state where oxygen is there to accept them to form water. Energy released by electrons is used by the giant protein ATPase to form the energy currency ATP. A total of 36 or 38 moles of ATP are produced per mole of glucose in aerobic respiration. It was a simple a ...

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by freshbiology
Fri Jul 17, 2009 5:39 pm
 
Forum: General Discussion
Topic: cellular respiration???
Replies: 1
Views: 99

membrane permeability

... permeable to the same degree to both Na+ and K+ the two ions could not move across the membane at the same rate! In the second step of Na+/K+ ATPase 3 Na+ ions move out of the cell into the extracellular space reducing an ATP molecule to ADP. In turn, in the 4th step of the NA+/K+ ATPase, ...

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by NewtoBiology
Wed Jul 15, 2009 11:40 pm
 
Forum: Molecular Biology
Topic: membrane permeability
Replies: 2
Views: 208

ATP ase vs. ADP ase

"I mean can these two reactions be catalyzed by the same enzyme, which we just refer to as ATPase:" If I am not badly mistaken, enzymes that can do ATP hydrolysis (ATP ==> ADP + Pi) are usually poor catalysts for ADP hydrolysis. But as noted above, under appropriate ...

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by Borisfen
Mon Feb 16, 2009 8:11 am
 
Forum: Molecular Biology
Topic: ATP ase vs. ADP ase
Replies: 8
Views: 1721

Activation of myosin?

Could anyone help me to describe the activation of myosin? Is it when ATPase in the myosin head hydrolyzes ATP to ADP and P which provides energy needed to return myosin head to its prestroke high-energy? Or it is when ATP attaches to myosin head and detach ...

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by Vangeek
Wed Feb 11, 2009 3:15 am
 
Forum: Cell Biology
Topic: Activation of myosin?
Replies: 2
Views: 522
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