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NF1 cDNA sequence alterations in representative cell lines and primary tumors. Chromatograms showing (A) absence of 17 bp of exon 17 from the cDNA of cell line OVCA429, (B) deletion of exon 4a in cDNA from PEO4, (C) portion of 178 bp insertion from intron 44 between exons 44 and 45 in tumor OSC-18, and (D) deletion of exons 22 and 23-1 in cDNA from tumor OSC-25.
