Measurements of oxygen binding by whole human blood, at \( 37^{\circ} \mathrm{C} \), at pH 7.4 , and in the presence of 40 mm Hg of \( \mathrm{CO}_{2} \) and normal physiological levels of BPG (5 \( \mathrm{mmol} / \mathrm{L} \) of cells), give the following: From these data, construct a binding curve. The Bohr effect in hemoglobin. Express your answer using two significant figures.