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. 2007 Aug 29;2(8):e799. doi: 10.1371/journal.pone.0000799

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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T4 was grown on E. coli sulA-inactivated and lexA non-inducible mutant strains (defective SOS systems), as well as an ftsZ-inactivated mutant strain (non-antibiotic induced filamentation), in the presence of disks of cefotaxime (CTX). Isogenic wild-type strains (wt) are also included and representative plaques demonstrating the PAS effect are indicated by red arrows. All plates were photographed at identical magnifications.