| 单词 | kappa particles |
| 释义 | > as lemmaskappa particles 2. Biology. An agent in some strains of Paramecium aurelia that confers on cells possessing it the property of producing a substance toxic to Paramecium cells lacking it, and exists as small cytoplasmic particles ( kappa particles) capable of reproducing independently of the cell containing them and of infecting other Paramecium cells; these particles collectively. Frequently attributive. ΘΚΠ the world > life > biology > substance > cell > cell organelle or contents > [noun] > other organelles or contents raphide1831 body1839 raphid1863 mucigen1874 cell sap1875 globoid1875 raphis1879 pyrenoid1883 mucinogen1884 plastid1885 molluscum corpuscle1886 hyalosome1889 molluscum body1892 statolith1892 dictyosome1893 centrosome1895 Nissl body1898 Nissl granule1898 Nissl substance1899 archespore1901 blepharoplast1907 liposome1910 statocone1910 kinetosome1912 Golgi body1916 kinetoplast1925 lipochondrion1936 microsome1943 kappa1945 Pappenheimer body1947 microbody1954 lysosome1955 siderosome1957 ribosome1958 melanosome1961 cisterna1962 microtubule1962 plasmalemmasome1962 phagolysosome1963 informosome1964 monosome1964 mucocyst1965 peroxisome1965 rhoptry1967 spectrin1968 virosome1970 1945 T. M. Sonneborn in Amer. Naturalist 79 319 The alternative characters, killer and non-killer, are determined by a pair of allelic genes, K and k, and a cytoplasmic factor, which may be called kappa. Clones are killers only when both the dominant gene K and the cytoplasmic factor kappa are present; they are non-killers when kappa is absent, regardless of genic constitution. 1945 T. M. Sonneborn in Amer. Naturalist 79 332 How can the unequal division of kappa at fission be accounted for? 1947 Genetics 32 106 Under conditions in which the concentration of kappa decreases, two methods may be used to find the number of kappa particles per original killer cell. 1951 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) ii. 91 The factor kappa can reproduce itself in the cytoplasm but only if the gene K is present in the nucleus. 1965 A. R. Peacocke & R. B. Drysdale Molecular Basis Heredity ii. 7 These so-called kappa particles are probably best regarded as self-determining invaders and not as part of the normal cell. 1969 J. R. Preer in Res. Protozool. 174 Kappa itself has been shown..to respire and utilize glucose and sucrose in vitro. The presence in kappa of the biochemical apparatus required for such a sophisticated metabolism clearly eliminates the possibility that it is a virus. 1969 J. R. Preer in Res. Protozool. 183 The kappas of stocks 7 and 51. < as lemmas |
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