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Table 3 Detection of variants in decreasing proportions of the total sample using GeneRead V.1

From: A reliable method for the detection of BRCA1 and BRCA2 mutations in fixed tumour tissue utilising multiplex PCR-based targeted next generation sequencing

Sample

Variant

Dilution

% coverage @100x

Expected variant allele proportion*

Observed variant allele proportion

Variant reads/total reads

AZ10

BRCA2 c.10095delinsGAATTATATCT p.(Ser3366AsnfsTer4)

1/2

96.9%

~46%

48%

2107/4405

1/4

97.0%

~23%

20%

1438/7185

1/8

97.0%

~11%

9%

747/7871

1/16

96.5%

~5%

4%

322/7591

AZ17

BRCA1 c.2060A>C p.(Gln687Pro)

1/2

97.0%

~45%

72.2%

5094/7051

1/4

97.0%

~23%

55.5%

3428/6174

1/8

97.0%

~11%

33.6%

2220/6610

1/16

97.0%

~5.5%

19.1%

1056/5523

AZ23

BRCA2 c.7007+1G>C

1/2

96.9%

~40%

67%

2645/3949

1/4

97.0%

~20%

51%

3235/6340

1/8

97.0%

~10%

35.1%

3264/9287

1/16

97.0%

~5%

20.2%

1351/6700

  1. *Expected frequencies were based on results from a previous run where the samples were undiluted.