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Plasmid miniprep. 0.8% agarose gel ethidium bromide-stained.. A plasmid preparation is a method of DNA extraction and purification for plasmid DNA.It is an important step in many molecular biology experiments and is essential for the successful use of plasmids in research and biotechnology.
To perform a run-off transcription assay, a gene of interest, including the promoter, is cloned into a plasmid. [4] The plasmid is digested at a known restriction enzyme cut site downstream from the transcription start site such that the expected mRNA run-off product would be easily separated by gel electrophoresis .
Plasmid Cloning Guides Molecular Cloning Guides —References to help scientists design plasmid cloning experiments, including tutorials on restriction enzyme digestion and PCR-based cloning. Molecular Cloning Protocols —Specific protocols for a variety of plasmid cloning techniques, such as isolation of bacterial colonies, DNA purification ...
Cold Spring Harbor Protocols (formerly CSH Protocols) is an online scientific journal and methods database for biologists, published by Cold Spring Harbor Laboratory Press. Protocols are presented step-by-step and edited in the style that has made Molecular Cloning, Antibodies, Cells and many other CSH manuals essential [ tone ] to the work of ...
In standard cloning protocols, the cloning of any DNA fragment essentially involves seven steps: (1) Choice of host organism and cloning vector, (2) Preparation of vector DNA, (3) Preparation of DNA to be cloned, (4) Creation of recombinant DNA, (5) Introduction of recombinant DNA into the host organism, (6) Selection of organisms containing ...
The fertility plasmid or F-plasmid was discovered by Esther Lederberg and encodes information for the biosynthesis of sex pilus to aid in bacterial conjugation. Conjugation involves using the sex pilus to form a bridge between two bacteria cells; this bridge allows the F+ cell to transfer a single-stranded copy of the plasmid so that both cells contain a copy of the plasmid.
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