Sequencing of BRCA1 amplified from genomic DNA of lymphocytes and microdissected ovarian tumor cells of a familial ovarian cancer patient revealed three , rare heterozygous DNA variations ( 2418delA , 233G-->A , and IVS1-10T-->C ) in both tumor and constitutional ( lymphocyte ) DNA .
sequencing of brca1 amplified from genomic dna of lymphocytes and microdissected ovarian tumor cells of a familial ovarian cancer patient revealed three , rare heterozygous dna variations ( 2418dela , 233g-->a , and ivs1-10t-->c ) in both tumor and constitutional ( lymphocyte ) dna .
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