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Volume 65, Issue 2

Genetic Characteristics of Streptomycin-resistant Streptococci Free

Abstract

SUMMARY: The genetic properties of transformable (SR 5a) and non-transformable (SR30) streptomycin-resistant streptococci were examined. In mutant SR30, the very high resistance (VHR) phenotype appeared to be due to at least two factors; a high resistance (HR) mutation and an enhancing modifier gene. In mutant SR 5a, resistance was due to a single VHR mutation which is allelic to the HR mutation of mutant SR 30. The transfer of non-trans-formability (Ntr) by SR 30 DNA revealed that this factor is separable from the streptomycin resistance marker and the enhancing modifier. Results indicate co-transfer of Ntr with the HR marker.

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© Society for General Microbiology 1971
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1971-02-01
2023-09-29
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Genetic Characteristics of Streptomycin-resistant Streptococci
Microbiology 65, 139 (1971); https://doi.org/10.1099/00221287-65-2-139
/content/journal/micro/10.1099/00221287-65-2-139
/content/journal/micro/10.1099/00221287-65-2-139
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