| 释义 |
heterochromatin Cytol.|ˌhɛtərəʊˈkrəʊmətɪn|
[a. G. heterochromatin (E. Heitz 1928, in Jahrb. f. wissenschaftliche Bot. LXIX. 764), f. hetero- + chromatin.]
Heterochromatic chromosome material.
1932[see euchromatin]. 1941Ann. Bot. V. 203 Large distal segments which appear as heterochromatin in mitosis, that is to say they are overstained in resting nuclei and, after freezing, understained in metaphase. 1951G. H. Bourne Cytol. & Cell Physiol. (ed. 2) v. 196 Probably there are many varieties of heterochromatin and euchromatin, constituting a continuous ‘spectrum’, to the two ends of which the terms heterochromatin and euchromatin are somewhat arbitrarily applied. 1969Nature 16 Aug. 683/1 The observations that heterochromatin formation is a variable property and represents cyclical physiological states of chromosome segments..led to a shift of emphasis from heterochromatin as a substance to heterochromatin as a state. |