Hemoglobin miyada: DNA analysis of the anti‐lepore βδ fusion gene

Hemoglobin Miyada, an anti‐Lepore hemoglobin, represents the protein product of a nonhomologous crossover between β and δ genes. The mutant globin is β‐like from the N terminus to amino acid 12, and δ‐like from amino acid 22 through the C terminus, thus predicting a crossover site in the first coding region of the gene. DNA analysis, using multiple restriction endonucleases and hybridization to δ and β globin gene‐specific probes, confirms that the βδ hybrid gene 1) is located on a single chromosomal fragment between normal δ and β genes, and 2) has 5′ β promoter sequences, δ IVS 1 and 2, and 3′ coding and flanking sequences.