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Architecture of region 4 in O. oeni (IOEB Sarco 1491 and PSU-1) and L. plantarum. In the IOEB Sarco 1491 strain, the 7-kb region contains 11 genes flanked by two IS30 sequences. A statistically significant positive association was found between HP strains and the presence of sequences indicated by hatched arrows. Primers Reg 4 F and Reg 4 R are represented by black arrows.
