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Genetic dissection of Helicobacter pylori AddAB role in homologous
Genetic dissection of Helicobacter pylori AddAB role in homologous

... single addB mutant is extremely sensitive to IR. Inactivating both genes, addA and addB, resulted in the same sensitivity as that of the single mutants (Fig. 2b). These results confirm that AddA and AddB act together in the repair of IR-induced DNA damage. Inactivation of the AddAB complex made the ...
Cybertory Manual (WP) - Attotron Biosensor Corporation
Cybertory Manual (WP) - Attotron Biosensor Corporation

... Electrophoresis is a very common method for determining DNA fragment sizes. The phosphate groups of DNA make it an acid; they are highly negatively charged in aqueous solution at neutral pH. When negatively charged DNA molecules are placed in an electric field, they migrate toward the positive elect ...


... RNA molecule off a DNA template, begins when RNA polymerase attaches to a promoter. Elongation of an RNA molecule occurs through the process of complementary base pairing until there is a DNA stop sequence. Messenger RNA (mRNA), which now carries codons, is processed before it leaves the nucleus; in ...
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19 extranuclear inheritance

... cristae which provide a large surface area for ATP production. (2) Its inner membrane is impermeable to ions and small molecules. The process of energy production begins when sugars are broken down in the cytoplasm to produce pyruvate and a small amount of ATP. The pyruvate enters the mitochondria, ...
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... messenger RNA (mRNA) they had found over 120,000. Each of these can in turn be translated into a unique protein. ...
DNA
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... to genetic engineering遺傳工程, the direct manipulation of genes for practical purposes • DNA technology has revolutionized biotechnology, the manipulation of organisms or their genetic components to make useful products • An example of DNA technology is the microarray 生物微陣列晶片, a measurement of gene exp ...
Chapter 3 Protein Synthesis
Chapter 3 Protein Synthesis

... Each codon specifies a particular amino acid There are 20 different amino acids There are 64 different combinations of A, U, G, and C that a codon could have ( 4x4x4)  There are three “stop” codons acting as a “period” in a sentence  The “sentence” is that strip of mRNA produced by the section of ...
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... Since there are approximately 3 x 109 base pairs in the human genome, and any given gene may be no more than 104 base pairs, analysis of the total population of human DNA is impossible. Clearly, a gene must be isolated apart from the total DNA and amplified to allow a detailed study. Early studies o ...
Enzyme Mechanisms - Illinois Institute of Technology
Enzyme Mechanisms - Illinois Institute of Technology

... bacterium resistant to a specific antibiotic, along with whatever other genetic materials the experimenter or clinician wishes to incorporate Thus the cells that have replicated the plasmid will be antibiotic-resistant; surviving colonies will be guaranteed (?) to contain the desired plasmid in all ...
Your Spitting Image Guide DOC - University of Maryland School of
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... These building blocks or nucleotides are adenine (A), thymine (T), cytosine (C), and guanine (G). An A always pairs with a T and a C always pairs with a G. The human genome (complete set of DNA) has about 3 billion nucleotides. The order of the nucleotides in a DNA strand is a sequence. Each person ...
TCU Taiwan Championship Poster
TCU Taiwan Championship Poster

... Filamentous phage can only infect bacteria with F pili. Its life cycle described in following steps: Adsorption: In this step, M13 and M13KO7 are the same. Both of their pilus attachment protein gp3 and gp6 will help them bind on F pilus, then the phage will move into host cell by F pilus and take o ...
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... An Arabidopsis thaliana flowering mutation has been mapped very close to an RFLP marker on chromosome 3 (so close in fact that no recombinants are detected between the mutation and the RFLP marker). The RFLP is due to the presence of a VNTR (variable number tandem repeat) located between two restric ...
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Cellular Process: RNA and Protein Synthesis

... Some students may think that the purpose of protein synthesis is to make amino acids. Since they work hand in hand, students are always hearing the terms used together. As a result, students often lose track of where amino acids originate from, and the purpose of protein synthesis. Once synthesized ...
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... Vast majority of the genome has to be shut down or silenced Knowing which genes to keep on and which ones to silence is critical for a cell to survive and proliferate normally during development and differentiation Transcription factors bind active genes and keep them active DNA methylation of inact ...
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... transfected with scrambled oligonucleotides (negative control 1, AMBION) were used as controls. NF-kB binding site prediction. To predict NF-кB binding sites in the promoter of this cluster, we collected experimentally verified NF-кB binding site sequences in literature and built positional weight m ...
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... When penicillin became widely available during the second world war, it was a medical miracle, rapidly vanquishing the biggest wartime killer--infected wounds. Discovered initially by a French medical student, Ernest Duchesne, in 1896, and then rediscovered by Scottish physician Alexander Fleming in ...
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... in a single reaction by the combined use of a thermostable DNA polymerase and thermostable DNA ligase.1 This technique relies on the absence of strand displacement activity of the thermostable polymerase which allows annealing of an internal mutagenic primer to the template strand. Phosphorylation o ...
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... phenol or phenol:chloroform are used to separate the nucleic acids, into the aqueous phase, from the other cellular components including proteins, found in the organic phase. New techniques are now available which avoid the use of phenol (a toxic product). • A second method consists in precipitation ...
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Specialized techniques for site-directed mutagenesis in cyanobacteria
Specialized techniques for site-directed mutagenesis in cyanobacteria

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... The synthesis of both complementary antiparallel DNA strands occurs in the 5' to 3' direction. One strand, known as the leading strand, is synthesized as a continuous process. The other strand, known as the lagging strand, is synthesized in pieces called Okazaki fragments, which are then joined toge ...
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Genes and Chromosomes
Genes and Chromosomes

... The placement of centromeres relative to the length of the chromosome is different for each chromosome. Centromeres can be in the center of the chromosome (as the name would suggest), or towards an end. Centromeres consist of some defined sequence elements, but are mostly less well defined repetitiv ...
Dot plot - TeachLine
Dot plot - TeachLine

... Compare new genes to known ones Compare genes from different species information about evolution ...
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Cre-Lox recombination



In the field of genetics, Cre-Lox recombination is known as a site-specific recombinase technology, and is widely used to carry out deletions, insertions, translocations and inversions at specific sites in the DNA of cells. It allows the DNA modification to be targeted to a specific cell type or be triggered by a specific external stimulus. It is implemented both in eukaryotic and prokaryotic systems.The system consists of a single enzyme, Cre recombinase, that recombines a pair of short target sequences called the Lox sequences. This system can be implemented without inserting any extra supporting proteins or sequences. The Cre enzyme and the original Lox site called the LoxP sequence are derived from bacteriophage P1.Placing Lox sequences appropriately allows genes to be activated, repressed, or exchanged for other genes. At a DNA level many types of manipulations can be carried out. The activity of the Cre enzyme can be controlled so that it is expressed in a particular cell type or triggered by an external stimulus like a chemical signal or a heat shock. These targeted DNA changes are useful in cell lineage tracing and when mutants are lethal if expressed globally.The Cre-Lox system is very similar in action and in usage to the FLP-FRT recombination system.
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