Question: Calcium ions bind to the SERCA Ca2+Ca2+ -ATPase, which has two identical calcium sites, in two stages with apparent equilibrium constants K1=7105M1 and K2=2106M1 A.

Calcium ions bind to the SERCA Ca2+Ca2+ -ATPase, which has two identical calcium sites, in two stages with apparent equilibrium constants K1=7105M1 and K2=2106M1

A. Calculate K.

The answer for A is not 14x10^11 nor 0.1x10^13 nor 1.4x10^11 nor 1x10^11

B. Calculate .

C. Is the binding positively or negatively cooperative?

The binding is positively cooperative.

The binding is negatively cooperative.

The binding could be both positively and negatively cooperative.

The binding is neither positively nor negatively cooperative.

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