Morphology of nucleolar cistrons in a plant cell, Acetabularia mediterranea
Please always quote using this URN: urn:nbn:de:bvb:20-opus-32213
- The structural organization of transcriptionally active DNA that contains cistrons for precursor molecules of ribosomal RNA is described in positively stained spread preparations from nuclei and nucleoli isolated from the green alga, Acetabularia mediterranea Lmx. These nuclei contain large aggregates of nucleolar subunits in which fibril-covered regions, the putative active cistrons for precursors of ribosomal RNA, alternate with fibril-free intercepts, the "spacers". The length distribution of the different intercepts of this DNA is given,The structural organization of transcriptionally active DNA that contains cistrons for precursor molecules of ribosomal RNA is described in positively stained spread preparations from nuclei and nucleoli isolated from the green alga, Acetabularia mediterranea Lmx. These nuclei contain large aggregates of nucleolar subunits in which fibril-covered regions, the putative active cistrons for precursors of ribosomal RNA, alternate with fibril-free intercepts, the "spacers". The length distribution of the different intercepts of this DNA is given, and the pattern is compared with those shown in animal cell systems. The data are discussed in relation to problems of transcription and of amplification of ribosomal RNA genes.…
Author: | Michael F. Trendelenburg, Herbert Spring, Ulrich Scheer, Werner W. Franke |
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URN: | urn:nbn:de:bvb:20-opus-32213 |
Document Type: | Conference Proceeding |
Faculties: | Fakultät für Biologie / Theodor-Boveri-Institut für Biowissenschaften |
Language: | English |
Year of Completion: | 1974 |
Source: | In: Proc. Natl. Acad. Sci. (1974), 71, 3626-3630. |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
Tag: | ribosomal RNA genes; electron microscopy; spread preparations |
Release Date: | 2009/01/12 |