Figure 1: Structure of Igf2 gene, Igf2as, and DMR1-U2 mutation. The arrows indicate the five promoters (P0, Pm, P1, P2, and P3) for Igf2 and(P) for Igf2as. DMR1 indicates the position of the DMR1 regulatory region. V1, V2, V3, P0, and Pm indicate the five variants of Igf2 gene. The 5 kb deleted region in DMR1-U2 mice is indicated.