Fig. 1

G-banding, molecular, and FISH analyses. a Partial karyotype showing the der(7) t(7;13)(p14;q12) and der(13)t(7;13)(p14;q12) together with the corresponding normal chromosome homologs. Breakpoint positions are indicated by arrows. b Gel electrophoresis showing the amplified cDNA fragments. c Partial sequence chromatogram of the amplified cDNA fragment showing the junction point of exon 6 of the PAN3 gene with exon 2 of PSMA2. d Deduced amino acid sequence of the PAN3–PSMA2 fusion transcript. The out-of-frame sequence from PSMA2 is in bold. The asterisk indicates the TAG termination codon. e Ideogram of chromosome 7 showing the mapping position of the PSMA2 gene (vertical red line). f Diagram showing the FISH probe for PSMA2. Additional genes in this region are also shown. g Ideogram of chromosome 13 showing the mapping position of the PAN3 gene (vertical green line). h Diagram showing the FISH probe for PAN3. Additional genes in this region are also shown. i FISH on interphase nucleus showing a red PSMA2 signal, a green PAN3 signal, and two yellow fusion signals