All of the following hemoglobins are found in a normal human adult except:
a. Hb A
b. Hemoglobin Gower-2
c. Fetal hemoglobin (Hb F)
d. Hb A2
ANS: B
Hemoglobin Gower-2 is a hemoglobin comprised of two a and two e chains. It is found early in fetal life but disappears by approximately the third month of fetal life. All the other hemoglobins are found in a normal adult, although the predominant form is Hb A; it composes more than 95% of adult hemoglobin.
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