Clinical significance of K-ras and BRAF mutations in Chinese colorectal cancer patients

Table 3 Mutations of K-ras codons 12, 13, and 61 DNA detected by pyrosequencing assay

	Wild type (AA)	Point mutation (AA)	No. of mutations (%)
K-ras codon 12	GGT (Gly)	AGT (Ser)	2 (1.7)
	GGT (Gly)	GAT (Asp)	16 (13.6)
	GGT (Gly)	GCT (Ala)	2 (1.7)
	GGT (Gly)	GTT (Val)	8 (6.8)
K-ras codon 13	GGC (Gly)	GAC (Asp)	12 (10.2)
K-ras codon 61	CAA (Gln)	CAT (His)	1 (0.8)

AA: Amino acid; Gly: Glycinel; Gln: Glutamine; Ser: Serine; Asp: Aspartic acid; Ala: Alanine; Val: Valine; His: Histidine.