The Following Statements About Hemoglobin F (Fetal Hb) Are All

Multiple Choice

The following statements about hemoglobin F (fetal Hb) are all true EXCEPT

A) The P50 for O₂ is closer to 20 torr than 27 torr which is the P50 for adult Hb.
B) The beta chains are identical to those in adult hemoglobin.
C) Some terminal amino groups are acetylated.
D) The positive charges in the BPG binding cleft are fewer than in adult hemoglobin.
E) The diminished ability to unload O₂ is offset by a higher than adult concentration