Genomic organization of Mgf. Partial EcoRI restriction map. Arrows indicate sites of EcoRI restriction enzyme sites. Numbered and intervening boxes represent exons and introns, respectively. Gaps between boxes indicate that additional sequences could be located within this region as total genomic DNA and not a physical clone was used for mapping. Therefore, all fragments may not be identified by Southern blot analysis. Open boxes below represent the structure seen in C57BL/6J/Mayer and C3H, respectively. Numbers below open boxes represent the size of the EcoRI restriction fragments observed for the given fragments. A size polymorphism exists in intron 7 consisting of a repeat expansion and extensive sequence diversity.
