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. 2009 Jun 11;4(6):e5885. doi: 10.1371/journal.pone.0005885

Figure 5. LPS profiles of clinical H. pylori isolates grown in vitro at pH 7 and pH 5.

Figure 5

Silver staining of LPS from clinical H. pylori single-colony isolates grown in vitro at pH 7 and pH 5, revealed that some of the isolates grown at pH 5 expressed less LPS than isolates grown at pH 7, e.g. isolates Kx1259 and Kx1379 obtained from normal individuals. These isolates presented LPS that lack some of the high- and low-molecular structures in the pH 5 samples as compared to isolates grown at pH 7. The atrophy-associated isolates Kx345, Kx438, Kx1039 and Kx1172 presented similar LPS profiles after growth at pH 7 and pH 5, except Kx438:0 and Kx1039:4, which showed weaker LPS expression at pH 5 as compared to pH 7.