![An external file that holds a picture, illustration, etc., usually as some form of binary object. The name of referred object is rmmj_2-2-e0047f1.jpg](images\rmmj_2-2-e0047f1.jpg)
Figure 1.
Genomic structure of Hp alleles 1 and 2. Filled in boxes represent exonic sequences, dark lines represent intronic sequences. Hp 1 contains 5 exons. The Hp2 allele evolved from the Hp 1 allele following duplication of exons 3 and 4. Arrows pointing upward identify duplicated exons. Figure included with permission from Mary Ann Liebert, Inc. publishers (Levy et al, Antioxid Redox Signal 2010; 12:293–304).