Figure 1From: Classical sickle beta-globin haplotypes exhibit a high degree of long-range haplotype similarity in African and Afro-Caribbean populationsClassical βS haplotypes. The figure illustrates restriction fragment length polymorphisms in a 70 kb region around HBB. Five other globin synthesis genes are shown along with the approximate positions of four RFLP sites used to designate the five classical βS haplotypes.Back to article page