Schematic diagram showing the porcine karyotype. Each chromosome has its size represented (Mbp) . Porcine CpG island  and H3-rich isochore distribution  is shown on the right-hand side of each chromosome. Synteny to human CpG island distribution and early replicating DNA , synteny to late replicating human DNA , and synteny to human nuclear chromosome positions  are shown of the left-hand side of each chromosome. This was performed by examining syntenic regions between the porcine genome and human genome (https://wwwlgc.toulouse.inra.fr/pig/compare/SSC.htm - last accessed 26.08.10; see also http://piggenome.org/docs/index.php). Synteny for chromosomes 9, 10, 12, 14 were not performed since we did not have flow-sorted template for these chromosomes to make chromosome painting probes. Therefore we have no data for these chromosomes.