Question

The P50 for myoglobin is 2.8 torr. At what oxygen concentration will myoglobin be 75% saturated with oxygen

Answer 1

At 8.4 torr myoglobin will be 75% saturated with oxygen.

Calculation :

P50 is the partial pressure of the system.To achieve 50% saturation of oxygen to bind to myoglobin , the partial pressure needed is P50

P50 =2.8 torr

so, Mb+ O2 = MbO2

K= [Mb] [O2]/[MbO2]......................(1)

Yo2 ( fractional saturation of myoglobin )

Yo2=[MbO2]/[Mb]+[MbO2]..........................(2)

From equation (1) and (2)

we get Yo2= [O2]/K+[O2]= Po2 /K+ Po2

i)Yo2= 50% =2.8/K+2.8

0.5= 2.8/k +2.8

So, K= 2.8

ii) 75 % = [O2]/K+[O2]= [O2]/2.8+ [O2] = 8.4

Therefore, the oxygen concentration will be 8.4 torr.

Learn more about partial pressure here :

brainly.com/question/13199169

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