17) in acute promyelocytic leukemia (APL) produces the reciprocal fusion gene RAR alpha-PML.     ///    RAR alpha1-PML mRNAs and RAR alpha2-PML mRNAs from 5' PML breaksite cases coded for full-length RAR alpha-PML proteins but RAR alpha2-PML mRNAs from 3' PML breaksite cases encoded a truncated RAR alpha2 peptide. 