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Defined Nongrowth Media for Stage II Development of Competence in Haemophilus influenzae

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Herriott, R. M., Meyer, E. M., Vogt, M.·1970·Journal of Bacteriology

Abstract

The composition of a defined nongrowth medium used in stage II development of competence of Haemophilus influenzae affects the course of this development. The development of competence in two nongrowth media, M-IV and M-V, is rapid, logarithmic, and independent of the cell concentration. This last property indicates that there is probably no transfer of a competence factor from competent to noncompetent cells, in contrast to results reported for other organisms. Levels of competence reached in these completely defined media are such that 1 to 5% of the cells are transformed in the presence of an excess of marked deoxyribonucleic acid. The method of evaluating competence, which depends on the frequency of multiple independent transformations, has been reexamined. This and other methods are compared on samples taken from a culture during development of competence.

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Metadata

Authors
Herriott, R. M., Meyer, E. M., & Vogt, M.
Venue
Journal of Bacteriology
Published
1970-02
Volume
101
Issue
2
Pages
517-524
ISSN
  • 0021-9193 (ISSN-L)
  • 1098-5530
OpenAlex
W2127546816
Cited by
394
References
0
FWCI
4.29
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Defined Nongrowth Media for Stage II Development of Competence in Haemophilus influenzae. https://app.cochat.ai/papers/10.1128/jb.101.2.517-524.1970
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Herriott, R. M., Meyer, E. M., & Vogt, M. (1970). Defined Nongrowth Media for Stage II Development of Competence in Haemophilus influenzae. Journal of Bacteriology. https://doi.org/10.1128/jb.101.2.517-524.1970

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.