Similarly, the A549 (KRAS exon 2 c.34G>A, Fig. 1bii) and the CRC cell lines SW480 (KRAS exon 2 c.35G>T, Fig. 1biii) and DLD-1 (KRAS exon 2 c.38G>A, Fig. 1biiii) showed specific pyrogram traces, which were readily distinguishable from that of the KRAS exon 2 wild-type CRC cell line HT-29 (Fig. 1bi). Here, KRAS is linked to colorectal carcinoma.