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. 1983 Jul;80(13):4154–4158. doi: 10.1073/pnas.80.13.4154

Cloned genomic DNA sequences from Mycoplasma hyorhinis encoding antigens expressed in Escherichia coli.

M A Taylor, M A McIntosh, J Robbins, K S Wise
PMCID: PMC394219  PMID: 6346324

Abstract

A library of cloned Mycoplasma hyorhinis genomic sequences was constructed by incorporation of EcoRI digestion fragments of mycoplasma DNA into the lambda Charon 4A bacteriophage vector. Immunological screening of recombinant phage plaques identified clones containing genes encoding mycoplasma antigenic structures expressed in an Escherichia coli host. Two such recombinant phage isolates, lambda Ch4A-MhrG1 and lambda Ch4A-MhrG28, were defined and found to contain distinct genomic sequences by analysis of restriction endonuclease fragments. Inoculation of mice with recombinant gene products from lambda Ch4A-MhrG1 yielded antiserum selectively recognizing a Mr 29,500 trypsin-sensitive mycoplasma constituent. This established a means for producing selected immunogenic mycoplasma component in a bacterial host. The cloned genomic sequences of M. hyorhinis encoding expressed mycoplasma antigens represent molecular probes that can be characterized both by specific DNA sequences and by the antigenic structure of corresponding gene products. These genomic fragments define initial physical markers of the M. hyorhinis genome and may be useful in assessing antigenic and molecular genetic relationships within the genus Mycoplasma and among other members of the class Mollicutes.

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Selected References

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