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DNA Sequencing
DNA Sequencing

... • RFLP detects DNA differences that affect restriction sites, because they “cut” differently if there are nucleotide variations • Restriction fragment analysis – Can rapidly provide useful comparative information about DNA sequences – Cut up the DNA region of interest using restriction enzymes, run ...
What is Francisella? - Oregon State University
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Molecular Basis of Heredity--ST03 1.2.7
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Transformation
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C2005/F2401 Key to Exam #3
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... A & B (not required) – If the strep resistance gene works, then it was not cut up by Hind III, and nothing was inserted into it. It is intact. The pME plasmid had one Hind III site. When it was cut and the fragment inserted, each end of the fragment joined one half of the original Hind III site, mak ...
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... F-: This strain does not carry the F plasmid (DNA plasmid called Fertility Factor or Sex Factor). endA1: This strain lacks Endonuclease I (non-specific digestion) for cleaner preparations of DNA and better results in downstream applications. glnV44: In this strain a suppression of amber (UAG) stop c ...
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Experiment 2 Plasmid DNA Isolation, Restriction Digestion and Gel

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Chapter 11 : BIOTECHNOLOGY-PRINCIPLES
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... The HPV genome can be divided into three regions: the upstream regulatory region (URR), the early (E) genes, and the late (L) genes. All open reading frames (ORFs) are encoded by the same DNA strand of the viral genome. All mRNA transcription proceeds in the same direction. Utilization of several pr ...
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... was partially digested with Sau3A to give a random distribution of DNA fragments. Size-fractionated fragments of between 5 and 10 kb were ligated into vector pSU19, previously digested with BamHI and treated with calf intestinal alkaline phosphatase to prevent re-annealing. Recombinant DNA was intro ...
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Genetic Basis of Variation in Bacteria
Genetic Basis of Variation in Bacteria

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molecular biology
molecular biology

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Présentation PowerPoint
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Transcriptional activity and role of plasmids of
Transcriptional activity and role of plasmids of

... than 3 Log2 FC in mM+Hops, compared to only the top four SDE genes in Lb464 expressed at this level (Table 3). The difference in total SDE transcripts was unexpected given that hop extract was clearly affecting the growth rate of each bacterium (Figure 1). Although there are fewer genes SDE at level ...
DNA Sequencing
DNA Sequencing

... Gel electrophoresis separates macromolecules on the basis of their rate of movement through a gel in an electric field. How far a DNA molecule travels while the current is on is inversely proportional to its length. A mixture of DNA molecules, usually fragments produced by restriction enzyme digesti ...
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Plasmid



A plasmid is a small DNA molecule within a cell that is physically separated from a chromosomal DNA and can replicate independently. They are most commonly found in bacteria as small, circular, double-stranded DNA molecules; however, plasmids are sometimes present in archaea and eukaryotic organisms. In nature, plasmids often carry genes that may benefit the survival of the organism, for example antibiotic resistance. While the chromosomes are big and contain all the essential information for living, plasmids usually are very small and contain only additional information. Artificial plasmids are widely used as vectors in molecular cloning, serving to drive the replication of recombinant DNA sequences within host organisms.Plasmids are considered replicons, a unit of DNA capable of replicating autonomously within a suitable host. However, plasmids, like viruses, are not generally classified as life. Plasmids can be transmitted from one bacterium to another (even of another species) via three main mechanisms: transformation, transduction, and conjugation. This host-to-host transfer of genetic material is called horizontal gene transfer, and plasmids can be considered part of the mobilome. Unlike viruses (which encase their genetic material in a protective protein coat called a capsid), plasmids are ""naked"" DNA and do not encode genes necessary to encase the genetic material for transfer to a new host. However, some classes of plasmids encode the conjugative ""sex"" pilus necessary for their own transfer. The size of the plasmid varies from 1 to over 200 kbp, and the number of identical plasmids in a single cell can range anywhere from one to thousands under some circumstances.The relationship between microbes and plasmid DNA is neither parasitic nor mutualistic, because each implies the presence of an independent species living in a detrimental or commensal state with the host organism. Rather, plasmids provide a mechanism for horizontal gene transfer within a population of microbes and typically provide a selective advantage under a given environmental state. Plasmids may carry genes that provide resistance to naturally occurring antibiotics in a competitive environmental niche, or the proteins produced may act as toxins under similar circumstances, or allow the organism to utilize particular organic compounds that would be advantageous when nutrients are scarce.
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