Fig. 1From: PIK3CA mutations are frequent in esophageal squamous cell carcinoma associated with chagasic megaesophagus and are associated with a worse patient outcomeElectropherogram of PIK3CA gene. Exon 9 – wild-type sequence and mutated sequence (D549H). Exon 20 – wild-type sequence and mutated sequence (H1047R)Back to article page