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The genomic organization of VH genes in haplotypes VH-a1, -a2, and -a3 (4). Each haplotype was estimated to have more than 100 VH genes in a 750-kb region. Only genes with known genomic locations are shown. The putative pseudogenes are indicated with black boxes. VHx and VHy are at the 5′ side of the all other VH genes shown here, but their locations are not well established. The genomic maps are approximate.
