THREE variants of fœtal hæmoglobin have so far been described primarily on the basis of electrophoretic mobility. These are known as: ‘Fessas and Papaspyrou’ type1, ‘Bart's’ type2, and ‘Alexandra’ type3. The ‘Fessas and Papaspyrou’ type appears to be relatively common and reports of its incidence have so far appeared from Singapore4 and Indonesia5. ‘Bart's’ hæmoglobin has been identified in specimens from Texas (Dr. B. Schneider) and Thailand (Dr. S. Tuchinda) (Drs. J. A. M. Ager and H. Lehmann, personal communication) and in one sample from Singapore.
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VELLA, F. Heterogeneity of Human Fœtal Hæmoglobin: Incidence of Fœtal Variants in Singapore. Nature 184, 272–274 (1959). https://doi.org/10.1038/184272b0
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