The genomic organization of the Mater duplication. (a) Location of the Mater duplication. A snapshot view of GMOD browser (details can be found at [14]). (b) Chromosomal view (mouse chromosome 7) of the three Mater duplication locations (DUP1, DUP2, MaterP). (c) Graphical view of the sequence similarity between DUP1 and DUP2 shown by GenomePixelizer. DUP2 is situated in an inverse orientation with respect to DUP1. Red, 99-100% sequence identity; purple, 96-98%; green, 93-95%; blue, 90-92%; black, 85-89%. (d) Graphical view of the sequence similarity between DUP1 and the MaterP region. As shown, MaterP is an intron-less, retrotransposed pseudogene. Blue, 90-92% sequence identity; black, 85-89%.