Fig. 9. Extended Hill plot of the intact hemoglobin at 20°C pH 6.77 and 7.60. As indicated, the intersections between the lower and upper asymptotes to the Hill plot with the y-axis at logPo₂-0, indicate the values of logK_T and logK_R, respectively. Other conditions as in Fig. 8. K_R, oxygen-binding affinity of the hemoglobin in the oxygenated (relaxed) state; K_T, oxygen-binding affinity of the hemoglobin in the deoxygenated (tense) state; Y, saturation.