Table 2. Analysis of EGFR and KRAS gene mutations.

	EGFR Exon 19	EGFR Exon 20	KRAS Exon 2 codons 12/13	KRAS Exon 3 codon 61
HCC827	ΔE746-A750	WT	WT	WT
RA1	ΔE746-A750	WT	WT	WT
RA2	WT/ΔE746-A750	WT	WT	WT
RB1	ΔE746-A750	WT	WT	WT
RB1.1	ΔE746-A750	WT	WT	WT
RB2	ΔE746-A750	WT	WT	WT
HCC4006	ΔE746-A750	WT	WT	WT
RC2.2	ΔE746-A750	WT	WT	WT

Cells were analyzed for the mutational status by nucleotides direct sequencing. Δ: E746-A750 deletion of exon 19, WT: wild-type.