FIG 4.

Genomic location of primate A3 genes. (A) Genomic synteny of primate A3 genes. A segment represents a Z domain. A dot and arrowhead denote the start and end of the gene, respectively. Only nonretrocopy A3 genes are shown. (Left) A3 genes in the canonical A3 locus, which is situated between CBX6 and CBX7. (Right) A3 genes located in genomic loci other than the canonical A3 locus (e.g., unplaced scaffold sequences). (B) A3 retrocopy genes identified in primates. Genomic CDS structures of respective genes are shown. In addition to retrocopy genes, several A3 genes in the canonical A3 locus are shown. The detailed information is summarized in Data Set S2.