(Solved): Although the predominant hemoglobin in newborns is HbF, adult hemoglobin (HbA) is typically expres ...

Although the predominant hemoglobin in newborns is $$\mathrm{HbF}$$, adult hemoglobin $$(\mathrm{HbA})$$ is typically expressed as well. Mutant and wild-type $$\mathrm{HbA}$$ variants can be distinguished through isoelectric focusing (IEF) electrophoresis. Shown below is an IEF gel of four samples from newborn patients of an extended family with a history of an E6V mutation in $$\mathrm{HbA}$$. Which newborn is most likely homozygous for this mutation? A. Patient $$A(8\%)$$ B. Patient B (43\%) C. Patient C (27\%) D. Patient D (21\%)