英语词汇“f−”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

l. Bacteriology. [abbreviation of fertility n.] F, F agent, F factor, etc., a particulate factor which determines the mating type of certain bacteria (esp. Escherichia coli); hence F⁺, designating cells possessing the factor but not having it integrated into the chromosome; F⁻, designating cells lacking the factor; F′ (or F prime), designating cells in which a chromosomal fragment is attached to the factor. Also F duction, the conveyance of genes from F′ cells into F⁻ cells.

ΚΠ

1952 J. Lederberg et al. in Genetics 37 721 At the time, W-1607 was not analyzed further, but in view of later work will be labelled F⁻, in contrast to the type F⁺.

1953 Jrnl. Gen. Microbiol. 8 92 The majority..of F agents must remain bound to the cells.

1959 Adelberg & R. Burns in Rec. Genetic Soc. Amer. XXVIII. 57 The wild type sex factor (F′) of strain K-12 is characterized by its low affinity for the chromosome.

1960 F. Jacob et al. in Symp. Soc. Gen. Microbiol. X. 77 The similarities observed between this process, which might be called F-duction or sex-duction, and transduction with phage are extremely striking.

1967 F. E. Swatek Textbk. Microbiol. x. 291 In F⁺ × F⁻ matings the F factor is transferred to F⁻ bacteria.

单词	f−
释义	> as lemmas F− l. Bacteriology. [abbreviation of fertility n.] F, F agent, F factor, etc., a particulate factor which determines the mating type of certain bacteria (esp. Escherichia coli); hence F⁺, designating cells possessing the factor but not having it integrated into the chromosome; F⁻, designating cells lacking the factor; F′ (or F prime), designating cells in which a chromosomal fragment is attached to the factor. Also F duction, the conveyance of genes from F′ cells into F⁻ cells. ΚΠ 1952 J. Lederberg et al. in Genetics 37 721 At the time, W-1607 was not analyzed further, but in view of later work will be labelled F⁻, in contrast to the type F⁺. 1953 Jrnl. Gen. Microbiol. 8 92 The majority..of F agents must remain bound to the cells. 1959 Adelberg & R. Burns in Rec. Genetic Soc. Amer. XXVIII. 57 The wild type sex factor (F′) of strain K-12 is characterized by its low affinity for the chromosome. 1960 F. Jacob et al. in Symp. Soc. Gen. Microbiol. X. 77 The similarities observed between this process, which might be called F-duction or sex-duction, and transduction with phage are extremely striking. 1967 F. E. Swatek Textbk. Microbiol. x. 291 In F⁺ × F⁻ matings the F factor is transferred to F⁻ bacteria. extracted from Fn. < as lemmas
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> as lemmas