euchromaticadj.

/juːkrəʊˈmatɪk/

Etymology: < euchromatin n. + -ic suffix.

Cytology.

Of chromosome material: staining normally throughout the nuclear cycle.

ΚΠ

1936 Biol. Abstr. 10 1620/2 Chromosome I (X) is heterochromatic from the proximal end to almost the exact centre; from here to the distal end euchromatic.

1942 Nature 17 Jan. 66/2 The two properties of inertness and abnormality of nucleic acid cycle are combined in the same genes or chromomeres... These are then said to be heterochromatic as opposed to the active or euchromatic genes.

1951 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) v. 195 On the one hand the heterochromatic regions may be thicker and more dark-staining than the euchromatic ones... On the other hand, a heterochromatic region or chromosome may appear thinner and stain more weakly than euchromatic regions in the same nucleus.

1968 H. Harris Nucleus & Cytoplasm iv. 75 It is probable that other highly condensed heterochromatic or heteropyknotic regions in interphase nuclei also synthesize very much less RNA than the euchromatic regions.

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2018).

单词	euchromatic
释义	euchromaticadj. /juːkrəʊˈmatɪk/ Etymology: < euchromatin n. + -ic suffix. Cytology. Of chromosome material: staining normally throughout the nuclear cycle. ΚΠ 1936 Biol. Abstr. 10 1620/2 Chromosome I (X) is heterochromatic from the proximal end to almost the exact centre; from here to the distal end euchromatic. 1942 Nature 17 Jan. 66/2 The two properties of inertness and abnormality of nucleic acid cycle are combined in the same genes or chromomeres... These are then said to be heterochromatic as opposed to the active or euchromatic genes. 1951 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) v. 195 On the one hand the heterochromatic regions may be thicker and more dark-staining than the euchromatic ones... On the other hand, a heterochromatic region or chromosome may appear thinner and stain more weakly than euchromatic regions in the same nucleus. 1968 H. Harris Nucleus & Cytoplasm iv. 75 It is probable that other highly condensed heterochromatic or heteropyknotic regions in interphase nuclei also synthesize very much less RNA than the euchromatic regions. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2018). < adj.1936
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