Results of Southern blot with JH probe and LDI-PCR in cases studied. For each case, LDI-PCR products correspond in size to rearranged bands on Southern blot once unamplified distance between primers is allowed for. (A) Southern blot analysis of 10 μg of genomic DNA. Asterisks refer to germline bands. (B) Five microliters of LDI-PCR product was run on 0.8% agarose stained with ethidium bromide. A 1-kb ladder was used as a molecular weight marker.