Acta Haematol. 1979;61(5):295-7.

Differences between individuals with hemoglobins Istanbul and Saint-Etienne (alpha 2 beta 2 92F8 His replaced by Gln).

Abstract

The unstable hemoglobins Istanbul and Saint-Etienne have the same amino acid substitution (alpha 2 beta 2 92F8 His leads to Gln). Despite this, there are some clinical and hematological differences between the individual with Hb Istanbul and the one with Hb Saint-Etienne. These are: (1) the clinical course of the patient with Hb Istanbul before splenectomy was more severe when compared with that of the individual with Hb Saint-Etienne; (2) although Hb F was found within normal range in the individual with Hb Istanbul, a high level of Hb F (19%) was observed in the patient with Hb Saint-Etienne. The alkali-resistant Hb found in the former was of adult type and in the latter case it was of fetal type. The possible explanations for these differences are discussed.

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Differences between individuals with hemoglobins Istanbul and Saint-Etienne (alpha 2 beta 2 92F8 His replaced by Gln).

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