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Ethidium-stained gel of reverse transcriptase-polymerase chain reaction (RT-PCR) results for a patient with suspected Ewing’s sarcoma. Total RNA was extracted from frozen tumor tissue and subjected to RT-PCR. M, DNA molecular weight marker (100-bp ladder); lane 1, patient sample with molecular variant fusion transcript 540 bp; lane 2, type II fusion transcript positive control 324 bp; lane 3, negative no template control
