Fig. 2From: Genotypic determination of resistance and heteroresistance to clarithromycin in Helicobacter pylori isolates from antrum and corpus of Colombian symptomatic patientsPCR products for a 267 bp region of the 23S rDNA gene of Helicobacter pylori. 2% (w/v) Agarose gel. Line 1–9: Bacterial samples. Line 10: Blank of reaction. Line 11: Positive control Helicobacter pylori NCTC 11637. Line 12: 100 bp LeaderBack to article page