(A) Partial sequences of MLL-ABI-1 chimeric transcript. Vertical lines indicate the exon-exon junctions of each gene. Arrowheads indicate the fusion points of each cDNA. (B) ABI-1 cDNA clones (B48, B30) and e3B1. AAAAA, poly(A) tail. (C) Comparison among three types of ABI-1 (e3B1, B48, and B30) predicted amino acid sequence.