Detection of the TLS-CHOP genomic fusion fragments by PCR. Genomic DNAs derived from KS227 (lane 1), KS287 (lane 2), and KS386 (lane 3) were amplified by the following primers: KS227 and KS287, TLS431F, and CHOP105R; KS386, TLS847F, and CHOP105R. M, molecular size marker.