<prompt> In HbM the position of point mutationb chain, 87th codon, Histidine - Tyrosinea chain, 87th codon, Histidine - Tyrosineb chain, 6th codon, Glutamine - Valineb chain, 6th codon, Glutamine - Lysine  <response>: Ans. b a chain, 87th codon, Histidine - TyrosineRef: Wintrobes 12th ed 1060-1070M met hemoglobins are characterized by heme-iron oxidation and result in cyanosis.HbM Iwate HBA 87th position his - tyr 