Schematic comparison of the opossum MHC class I/II region and the putative class I/II region in the tammar wallaby. Colour code for genes; blue-class II, red-class I, purple-antigen processing genes, grey-pseudogenes. Each 100 Kb is represented by a short black line.
Siddle et al. BMC Genomics 2011 12:421 doi:10.1186/1471-2164-12-421