Correction

MICROBIOLOGY. For the article “A M_r 34,000 proinflammatory outer membrane protein (oipA) of Helicobacter pylori” by Yoshio Yamaoka, Dong H. Kwon, and David Y. Graham, which appeared in number 13, June, 20, 2000, of Proc. Natl. Acad. Sci. USA (97, 7533–7538), the authors note the following correction. The sequence of the HP0638 gene was incorrect as published. The sequence published was 5′-GCTTCACGAGAAAACGCCTT-3′ (reverse). The correct sequence is 5′-AAGGCGTTTTCTGCTGAAGC-3′ (reverse).