Fig. 5From: Genotyping of a gene cluster for production of colibactin and in vitro genotoxicity analysis of Escherichia coli strains obtained from the Japan Collection of MicroorganismsInduction of SOS response (umuC gene) by E. coli extracts in umu test. Relative LacZ activity to the clb− strain JCM1649T. Mean values of duplicated determinations are shown. 4-NQO as a positive control of DNA damaging agent (incubated for 3 h at 37 °C)Back to article page