of orthologous alleles from chimp and rhesus macaque and several options for filtering the data display. The Structural Variation annotation has been expanded to include structural variation data (17), deletions detected by several techniques (18–20) and numerous copy number polymorphism data sets (21–25). The SNP Arrays track displays SNPs available for genotyping with several different microarrays. The Exapted Repeats annotation displays conserved non-exonic elements that have been deposited by characterized mobile elements (26).
