GlobinsThalassemiaGenesBase SequenceFetal Hemoglobinbeta-Globinsbeta-ThalassemiaLeukemia, Erythroblastic, Acutealpha-GlobinsDNA Restriction EnzymesNucleic Acid HybridizationLocus Control RegionDNAMolecular Sequence DataRNA, MessengerMultigene FamilyGene Expression RegulationChromosome DeletionHemoglobinopathiesHemoglobins, AbnormalCloning, MolecularPrenatal DiagnosisReceptors, Adrenergic, beta-2ReticulocytesPromoter Regions, Geneticbeta 2-MicroglobulinGenes, SwitchChromosome MappingHemoglobin A2