Abstract

We present a refined genetic map of the obligate methylotroph Methylobacillus flagellatum. New, Hfr (high-frequency-of-transfer) donors, and pulsed-field gel electrophoresis, were used to determine that M. flagellatum contains one approximately 3.1-Mb circular chromosome, and no plasmids. A correlation between time-of-entry units and DNA length was established. Using in vivo and in vitro cloning, and sequencing, a number of new genetic markers were identified and mapped; in addition, the nature of some of the previously mapped markers was elucidated.

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