Which of the following is a typical finding in patients with Hb M? A)severe anemia requiring repeated blood transfusions B)elevated levels of ferrous iron (Fe²⁺) in the red cells C)presence of Heinz bodies on Wright-stained blood film D)elevated methemoglobin

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Methemoglobin is elevated in Hb M.Affected persons may have 30% to 50% methemoglobin (Fe³⁺).The amino acid substitutions found in the various Hb Ms cause heme iron to autooxidize,forming methemoglobin.Heinz bodies may be present,but they are not visible with a Wright stain.

Which of the Following Is a Typical Finding in Patients