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A transformation efficiency of 1×10 8 cfu/μg for a small plasmid like pUC19 is roughly equivalent to 1 in 2000 molecules of the plasmid used being transformed. In calcium chloride transformation, the cells are prepared by chilling cells in the presence of Ca 2+ (in CaCl 2 solution), making the cell become permeable to plasmid DNA. The cells ...
Gene conversion is the process by which one DNA sequence replaces a homologous sequence such that the sequences become identical after the conversion. [1] Gene conversion can be either allelic, meaning that one allele of the same gene replaces another allele, or ectopic, meaning that one paralogous DNA sequence converts another.
Transduction This is an illustration of the difference between generalized transduction, which is the process of transferring any bacterial gene to a second bacterium through a bacteriophage and specialized transduction, which is the process of moving restricted bacterial genes to a recipient bacterium. While generalized transduction can occur ...
Viral transformation can occur both naturally and medically. Natural transformations can include viral cancers, such as human papillomavirus (HPV) and T-cell Leukemia virus type I. Hepatitis B and C are also the result of natural viral transformation of the host cells. Viral transformation can also be induced for use in medical treatments.
The original target was onions (chosen for their large cell size), and the device was used to deliver particles coated with a marker gene which would relay a signal if proper insertion of the DNA transcript occurred. [7] Genetic transformation was demonstrated upon observed expression of the marker gene within onion cells.
In molecular biology, a reporter gene (often simply reporter) is a gene that researchers attach to a regulatory sequence of another gene of interest in bacteria, cell culture, animals or plants. Such genes are called reporters because the characteristics they confer on organisms expressing them are easily identified and measured, or because ...
Plasmids can be further divided into mobilizable and non-mobilizable classes. Plasmids that use other genetic element MFPs in the cell are mobilizable. Plasmids that are not mobilizable but spread by transduction or transformation are termed non-mobilizable. [5] Plasmids can often inject genes that make bacteria resistant to antibiotics. [6] [5]
Gene cassettes containing antibiotic resistance genes, or other virulence factors such as exotoxins, can be transferred from cell to cell via phage, transduction, taken up from the environment, transformation, [11] or by bacterial conjugation. [12]
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