| 释义 |
decondensation, n. Cytol.|ˌdiːkɒndɛnˈseɪʃən|
[f. de- II. 1 + condensation n.]
A process in which chromatin becomes less dense and compact; the degree of looseness of texture that results.
1900Zoologische Jahrbücher: Anat. XIV. 303 These granules resulting from this gradual decondensation of the chromatin of the chromosomes vary considerably in volume. 1969Jrnl. Cell Sci. IV. 583 It seems important to establish whether this decondensation of chromatin is impeded if DNA synthesis is inhibited. 1975Nature 9 Oct. 503/2 Centric heterochromatin in Drosophila metaphase chromosomes is organised into large blocks which show various degrees of condensation in prometaphase and various degrees of decondensation when living cells are Hoechst treated.
Hence (as a back-formation) deconˈdense v. intr. and trans., to (cause to) undergo decondensation; deconˈdensed ppl. a.
1965Decondense [see interkinesis n.]. 1969Jrnl. Cell Sci. IV. 583 Evidence from several sources suggests that only chromatin in the decondensed form is active as a template for DNA synthesis. 1975Nature 24 July 336/2 The heterochromatin of the X chromosome..decondenses right from the first fixation times. 1989B. Alberts et al. Molecular Biol. Cell (ed. 2) ix. 514 About 10{pcnt} of the DNA in interphase vertebrate cells is in a relatively decondensed conformation that correlates well with DNA transcription in these regions. Ibid. x. 582 Some sequence-specific DNA-binding proteins may function solely to decondense the chromatin in a local chromosomal domain. |