SEQUENCE THE cdtABC OPERON WAS CLONED FROM AN E. COLI 9142-88 CHROMOSOMAL DNA GENE LIBRARY. ...SEQUENCE THE cdtABC OPERON WAS CLONED FROM AN E. COLI 9142-88 CHROMOSOMAL DNA GENE LIBRARY. SEQUENCING OF THE OPERON IDENTIFIED A 2-BASE VARIATION IN cdtB AS COMPARED TO THE PUBLISHED SEQUENCE WHICH RESULTS IN A CHANGE IN TWO CdtB AMINO ACIDS, T57R AND L58V. THE AUTHORS BELIEVE THE VARIATION IN CdtB REPRESENTS A DNA SEQUENCING ERROR IN THE PUBLISHED E. COLI 9142-88 CDT SEQUENCE.