The 5' enhancer of the mouse mammary tumor virus long terminal repeat contains a functional AP-2 element.
Mellentin-Michelotti J, John S, Pennie WD, Williams T, Hager GL. The 5' enhancer of the mouse mammary tumor virus long terminal repeat contains a functional AP-2 element. J Biol Chem. 1994 Dec 16; 269(50):31983-90.