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Plasmid pQBR55 (~149 kb) represents one of five (Groups I-V) genetically distinct transfer proficient, mercury resistance plasmid groups that have been observed in the phytosphere pseudomonad community at a single geographic location in Oxford, UK. A 4.9-kb HindIII fragment was cloned from pQBR55 (a Group III plasmid) that facilitates autonomous replication of a narrow host range cloning vector, pKIL29,...
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