File:Amphibian oocyte transcription.jpg
Original file (1,200 × 841 pixels, file size: 475 KB, MIME type: image/jpeg)
Amphibian oocyte transcription
Amphibian oocyte nuclei contain numerous extra-chromosomal nuclei, each of which contains a tandem array of genes encoding ribosomal RNA. Active transcription is seen by the tree-like structures in which each branch represents a growing transcript. Untranscribed spacer DNA is seen between each transcript.
Methods developed by O.L. Miller Jr. and colleagues, the extra-chromosomal nuclei from a newt oocyte have been dispersed in low salt, and centrifuged through a sucrose cushion containing formaldehyde on to a carbon coated grid.
Reference
Fawcett DW. The Cell Chapter 4 Nucleus, Figure 144.
Micrograph courtesy of Oscar Miller.
Original Image: The Cell: An Image Library CIL:11043 http://www.cellimagelibrary.org/images/11043 original image has been rotated 90 degrees.
Copyright
Licensing: Attribution Non-Commercial; No Derivatives:This image is licensed under a Creative Commons Attribution, Non-Commercial, No Derivatives License.
NCBI Organism Classification: Notophthalmus viridescens Cell Type: oocyte Cellular Component: nucleolar chromatin
Cite this page: Hill, M.A. (2024, April 27) Embryology Amphibian oocyte transcription.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Amphibian_oocyte_transcription.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:22, 26 April 2011 | | 1,200 × 841 (475 KB) | S8600021 (talk | contribs) | ==Amphibian oocyte transcription== Figure 144 from Chapter 4 (Nucleus) of 'The Cell' by Don W. Fawcett M.D. Amphibian oocyte nuclei contain numerous extra-chromosomal nuclei, each of which contains a tandem array of genes encoding ribosomal RNA. Here, |
You cannot overwrite this file.
File usage
The following 2 pages use this file:
