Hemoglobin is 50% saturated with oxygen when pO2 = 26 torr (i.e. P50 = 26 torr ). If hemoglobin exhibited hyperbolic binding (as myoglobin does) with 50% saturation at 26 torr, what would be the fractional saturation () when pO2 = 30 torr and 100 torr? What does this tell you about the physiological importance of hemoglobin's sigmoidal oxygen binding curve?