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. 2015 Mar 28;7:9. doi: 10.1186/s13099-015-0056-2

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© Alam et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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PCR results of dupA 1 ( long type and short type) amplified with snt49F/2499R and dupAF/2499R sets of primers in representative H. pylori strains. Lane 1 denoted 1 kb marker (NEB). Lane 2–11 showed the long type dupA1 of 2499 bp and lane 12–21 yielded the short type dupA1 of 1884 bp, lane 2, 3 and 17 did not produce any amplicon. Lanes 11 and 21 were taken as negative controls.