The VDJ junction sequence of cases no. 4 through 8. The region used as clone specific primer is indicated in bold and italic letters. In cases no. 4 through 7, the clone-specific primer was designed in reverse orientation and PCR was performed in conjunction with Fr2 (in cases no. 4 and 5) or Fr3 (cases no. 6 and 7) consensus primer, whereas in case no. 8, the clone-specific primer was designed in forward orientation and paired with LJH primer for PCR. G, gastric tumor; SI, small intestinal tumor. N and D region are indicated.