The picture below compares part of the active sites for oxygen binding to the beta-globin subunit and the gamma-globin
subunit. Adult hemoglobin is an alpha2/betaz heteromeric tetramer, while fetal homoglobin is an alpha2/gammaz
heteromeric tetramer. If you examine the image, you see that the only difference is that the alpha residue Histidine143 is
Serine143 in the gamma subunit. Which statement is FALSE about the impact of the fetal subunit being Ser instead ofHis?

O Serine favors binding of 2,3-bisphosphoglycerate
O Serine causes the fetal hemoglobin to be a stronger oxygen binder than adult hemoglobin in the presence of 2,3-bisphosphoglycerate
O Serine in gamma vs Histidine in adult allows maternal blood to give up oxygen to fetal blood.
O This answer is incorrect - do not pick it.
O Histidine increases sensitivity to allosteric regulation by 2,3-bisphosphoglycerate