What is the effect of varying BPG concentrations on the oxygen saturation curves at different partial pressures of oxygen?

• A. Higher BPG concentrations shift the curve to the left, indicating increased oxygen affinity.
• B. Higher BPG concentrations have no effect on the oxygen saturation curves.
• C. Higher BPG concentrations stabilize the curve, maintaining constant oxygen affinity.
• D. Higher BPG concentrations shift the curve to the right, indicating decreased oxygen affinity.

Answer: (D)