Evidence that there are two types of determinant for tetracycline resistance among R-factors
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چکیده
منابع مشابه
There are two major types of skeletal keratan sulphates.
High-field 1H-n.m.r.-spectroscopic studies supported by chemical carbohydrate analyses show that skeletal keratan sulphates (KS-II) of bovine origin may be sub-classified into two groups. Keratan sulphate chains from articular and intervertebral-disc cartilage (KS-II-A) contain two structural features, namely alpha(1----3)-fucose and alpha(2----6)-linked N-acetyl-neuraminic acid residues, that ...
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متن کاملDoes a tetracycline resistance determinant of class N exist?
pMV120 was reported to carry the tetracycline resistance (Tcr) determinant of class N. We obtained tetracycline-susceptible transconjugants harboring plasmids with restriction enzyme profiles indistinguishable from those of pMV120 isolated from tetracycline-resistant clones. We conclude that pMV120 is a cryptic plasmid and that class N of Tcr determinants does not exist.
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Ureaplasma urealyticum is an organism considered susceptible to tetracycline. Ten tetracycline-resistant (Tcr) clinical isolates and Tcr serotype 9 were examined. All contained DNA sequences homologous to the streptococcal determinant tetM. They differed from each other on sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Southern blots, and immunoblots and appeared to represent differ...
متن کاملDistribution and mobility of the tetracycline resistance determinant tetQ.
We tested 34 American Type Culture Collection (ATCC) and 168 clinical bacterial isolates, from the human urogenital and oral tracts and streptococci isolated from cows with mastitis, for the presence of the tetQ gene using a polymerase chain reaction (PCR) assay and DNA-DNA hybridization. The identities of PCR products were confirmed by Southern blot hybridization of whole-cell DNA. Eleven of t...
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ژورنال
عنوان ژورنال: Genetical Research
سال: 1978
ISSN: 0016-6723,1469-5073
DOI: 10.1017/s001667230001781x