HBB Gene Structure
The HBB gene family is comprised of 5 functional genes and 1 pseudogene, 5’-epsilon, gamma G, gamma A, beta 1 pseudogene, delta, beta-3’ (Fig. 2) (Nucleotide, NCBI- Human Beta Globin Genomic Sequence, 2011)(Gene, NCBI- Human Beta globin ID 3043, 2011). The genes of this family are expressed at different stages of development.