A complex genomic region at a common copy-number breakpoint of the ERBB2 amplicon. For the 400-kb region (from 36.350 to 36.750 Mb in hg18), duplicated segments (1), genes (2), the locations of HapMap SNPs in four major populations (Release 27) (3), and copy-number variants (from the Database of Genomic Variants) (4) are shown. In (1), duplicated segments are shown for either direct repeats (top) or inverted repeats (bottom). The distribution of repetitive sequences is also shown between the direct and inverted repeats. The (2), (3), and (4) were obtained from UCSC genome browser.