Fig. 3From: Molecular characterization of MHC class IIB genes of sympatric Neotropical cichlidsRepresentation of intron-exon organization of MHC IIB sequences showing length of fragments and position of primers. The gel shows variation in the length of intron 2 (showing exon 2 / intron 2 / exon 3) for three individuals. * indicates lengths observed in sequences of the Amphilophus citrinellus draft genome shotgun sequencing project and ** indicate the exon that we found to be 12Â bp longer in allele DXB*060101 and DXB*07Back to article page