Electron Microscopic Studies of Replicating and Catenated Colicin Factor E1 DNA Isolated from Minicells
- 1 January 1972
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 69 (1) , 89-92
- https://doi.org/10.1073/pnas.69.1.89
Abstract
Replicating and catenated DNA molecules of colicin factor E1 that were isolated from minicells were observed by electron microscopy. Two new replicating structures that have been found include: molecules that contain two untwisted replicated branches of the same length and a twisted unreplicated branch, and a twisted circular molecule with a long tail. Other molecular forms identified include circular dimers, three types of catenated dimers (open-open, open-twisted, and twisted-twisted), catenated dimers in which one of the linked molecules is replicating, catenated trimers, and a tetamer.Keywords
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