Abstract
The relatedness of DNA sequences encoding citrate utilization was examined by hybridization with a cloned DNA fragment from a citrate utilization (Cit) plasmid, pOH30221, and DNA of other Cit plasmids. This revealed that there are at least two groups of Cit plasmids: the Inc W Cit plasmids, which show homology with the probe, and the Inc H1 plasmids, which do not.
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