Fig. 1From: Technical advance in targeted NGS analysis enables identification of lung cancer risk-associated low frequency TP53, PIK3CA, and BRAF mutations in airway epithelial cellsMutations identified in patient specimens. Sample mutation signal versus IS sequencing error. Variant allele frequency (VAF) of sample mutations (red triangle) relative to VAF of corresponding nucleotide-specific error variants in 19 IS replicates (black circle). VAF = site specific variant allele reads/total allele readsBack to article page