Chromosomal locations of human ampliconic genes and pseudogenes based on information about contigs, as well as MapViewer display of BLASTN results (see also Supplemental Table 1). The abscissa represents the ∼24-Mb euchromatic region with the Yp pseudoautosomal region at the left-most end. Palindromes are shown as hairpin-like structures; expanded views of the TSPY array and IR2 are shown in boxes.