NCIt definition : A fusion protein ( 2250 aa, 240 kDa) encoded by the MLL/AFF1 fusion gene. This protein
is comprised of the N-terminal half of the histone-lysine N-methyltransferase MLL
protein, including the AT hook DNA binding domain and the DNA methyltransferase domain,
fused to the C-terminal half of the AF4/FMR2 family member 1 protein.;