De, D. N., Kaufmann, B. P. (July 1956) Fine structure of chromosomes. J Biophys Biochem Cytol, 2 (4 Supp). pp. 419-24. ISSN 0095-9901 (Print)0095-9901 (Linking)
Abstract
Electron micrographs of staminate hair cells of Tradescantia reflexa indicate that early prophase chromosomes are composed of a number of helically arranged chromonemata. Favorable preparations reveal as many as 64 identifiable subsidiary strands, assumedly arranged as intertwined pairs to form a hierarchy of pairs of pairs. The helices of the smallest discernible units have a diameter of about 125 A, with highly electron-scattering material disposed peripherally around a less dense "core." The wall of this peripheral ring has a thickness of about 40 A, and apparently represents another pair of coiled threads surrounding a 40 A central axis. The implications of the findings are discussed briefly.
| Item Type: | Paper |
|---|---|
| Uncontrolled Keywords: | Animals *Chromosomes *Electrons *Hair Cells, Auditory *Helix (Snails) *Microscopy *Microscopy, Electron |
| Subjects: | bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > chromosomes, structure and function |
| CSHL Authors: | |
| Communities: | The Carnegie Institution Department of Genetics |
| Depositing User: | Matt Covey |
| Date: | 25 July 1956 |
| Date Deposited: | 22 Jan 2018 19:26 |
| Last Modified: | 22 Jan 2018 19:26 |
| PMCID: | PMC2229701 |
| Related URLs: | |
| URI: | https://repository.cshl.edu/id/eprint/35958 |
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