chromocentrechromocentern.
/ˈkrəʊməsɛntə/ A densely staining body formed in certain nuclei (see quot. 1949).
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the world > life > biology > substance > cell > cell organelle or contents > [noun] > nucleus > substances or structures of
nuclein1871
nucleoplast1876
nucleoplasm1882
plastin1883
nebenkern1885
nuclear sap1887
chromosome1889
karyotin1925
chromocentre1926
Barr body1961
1926 L. W. Sharp Introd. Cytol. (ed. 2) iv. 89 In many nuclei there are at certain stages one or more conspicuous accumulations of karyotin at certain points in the reticulum. Of the many terms applied to these the most suitable seems to be chromocenters.
1930 Biol. Abstr. 4 2220/1 Cytological investigations in 3 angiosperm genera..show that there are 2 ways in which the chromocenters may originate.
1935 T. S. Painter in Genetics 20 302 In the salivary gland, this area lies within, or better, is a part of, the ‘chromocenter’, or what I termed chromatic coagulum in my first papers.
1949 C. D. Darlington & K. Mather Elements of Genetics 383 Chromocentre, a body produced by fusion of the heterochromatin of the chromosomes in a resting nucleus. Especially applied to the Polytene chromosomes of Diptera.
1962 Lancet 29 Dec. 1384/1 The Barr body is a chromocenter of characteristic shape and position formed by heteropyknosis of an X chromosome (or part of one).
This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2018).
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n.1926