Pathology In HbM the position of point mutation A b chain, 87th codon, Histidine - Tyrosine B a chain, 87th codon, Histidine - Tyrosine C b chain, 6th codon, Glutamine - Valine D b chain, 6th codon, Glutamine - Lysine 💡 Explanation In HbM the position of point mutation ✓ Correct Answer: B. a chain, 87th codon, Histidine - Tyrosine