Fig 4. Comparison of EGFR exon 21 "hotspot" locus (c.2573T>G) mutation fraction and sequencing noise.
There was no significant difference in the fraction of EGFR exon 21 (cDNA position 2573) "hotspot" mutation (T>G) from the same base alteration fraction in the other T residues in the sequence (noise). Statistical significance was assessed by Wilcoxon test.