RT Journal Article SR Electronic T1 Highly Variable Mutation Rates in Commensal and Pathogenic Escherichia coli JF Science JO Science FD American Association for the Advancement of Science SP 1833 OP 1834 DO 10.1126/science.277.5333.1833 VO 277 IS 5333 A1 Matic, Ivan A1 Radman , Miroslav A1 Taddei, François A1 Picard, Bertrand A1 Doit , Catherine A1 Bingen , Edouard A1 Denamur , Erick A1 Elion , Jacques YR 1997 UL http://science.sciencemag.org/content/277/5333/1833.abstract AB