The haemoglobin of human foetus (HbF) has 4 Heme group and 1 globin. In HbF the globin protein is made up of 2α and 2β polypeptide chains. Each α has 141 amino acids and each β-has 146 amino acids but 37 amino acids in each β are different from that of HbA. It has higher affinity for O2 even at low PO2 and the oxygen −Hb dissociation curve remains towards the left of normal.
The haemoglobin of a human foetus
NEET UG 2008 — Zoology Breathing and Exchange of Gases
The haemoglobin of a human foetus
Held on 30 Apr 2008 · Verified 9 Jul 2026.
Options
- A
Has a higher affinity for oxygen than that of an adult
- B
Has a lower affinity for oxygen than that of the adult
- C
Its affinity for oxygen is the same as that of an adult
- D
Has only 2 protein subunits instead of 4
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