Figure 2. Analysis of 16S rRNA by PCR, RFLP and RAPD fingerprinting of different Helicobacter species.
Panel A: DNA isolated from various Helicobacter species including the Bengal tiger isolate was subjected to 16SrRNA PCR. A conserved 1.5 kb DNA fragment of the genus Helicobacter was amplified [52]. Panel B: To confirm their specificity, all PCR products were then investigated by RFLP (restriction fragment length polymorphism) using the restriction endonuclease AluI. The AluI pattern of the tiger isolate gave rise to 3 major bands (asterisks) which were unique to all other Helicobacters. Some similar bands were only found in the RFLP pattern of H. pylori and H. acinonychis (asterisks), indicating their close genetic relatedness. Panel C: RAPD fingerprinting of the Helicobacter isolates using primer D9355 was performed as described previously [27]. A typical RAPD fingerprinting profile is shown and revealed the relatedness between H. pylori, H. acinonychis and Bengal tiger isolate. Asterisks indicate three major bands which were identical among the latter three samples. M, DNA size marker.
http://dx.doi.org/10.1371/journal.pone.0071220.g002