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. 2001 Sep;69(9):5914–5920. doi: 10.1128/IAI.69.9.5914-5920.2001

FIG. 3.

FIG. 3

Urease activities of sonicated bacterial proteins in the phenol-hypochlorite assay. Scales differ for the three panels. (A) E. coli DH5α cotransformed with H. hepaticus urease genes (pHHuc1) and the H. pylori nickel transporter (pACYC184-nixA), or control plasmids (P = 0.008; Kruskal-Wallis one-way analysis of variance on ranks). (B) E. coli DH5α singly transformed with H. hepaticus urease genes (pHHuc1) or control plasmid (pC2) (P = <0.001; Mann-Whitney rank sum test). (C) Wild-type H. pylori and H. hepaticus. Differences are not statistically significant (t test).