Comparative genome analysis of the mouse imprinted gene impact and its nonimprinted human homolog IMPACT: toward the structural basis for species-specific imprinting.
Okamura K, Hagiwara-Takeuchi Y, Li T, Vu TH, Hirai M, Hattori M, Sakaki Y, Hoffman AR, Ito T. Genome Res. 2000 Dec; 10(12):1878-89.