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Molecular Biology
Molecular Biology

... which is located 25 nucleotides away from the site where transcription is initiated. (B) The TATA box is recognized and bound by transcription factor TFIID, which then enables the adjacent binding of TFIIB (C). (D) The rest of the general transcription factors as well as the RNA polymerase itself as ...
Gentile, Margaret: Computational Methods for the Design of PCR Primers for the Amplification of functional Markers from Environmental Samples
Gentile, Margaret: Computational Methods for the Design of PCR Primers for the Amplification of functional Markers from Environmental Samples

... Challenges of primer design for unknown, diverse sequences The design of a primer to amplify a gene of interest from all species present differs from the applications described above, because the sequence to be amplified is not actually known and can be quite different from known sequences of the ge ...
(2) rRNA
(2) rRNA

... 2. Nucleotides of RNA contain the sugar ribose instead of deoxyribose. The second carbon of ribose is attached to a hydroxyl group rather than hydrogen in deoxyribose. 3. RNA has uracil instead of thymine found in DNA. 4. RNA is usually single stranded. However, a secondary structure can form by pai ...
REVIEW ARTICLE Gene cassettes
REVIEW ARTICLE Gene cassettes

... incorrectly identified in the primary publication of the sequence. The extent of each gene, assuming that the first in-frame initiation codon within the cassette boundary is the start codon, is also listed in Table 1. The genes listed account for a significant proportion of the antibioticresistance ...
P-Element Transformation with period Locus DNA Restores
P-Element Transformation with period Locus DNA Restores

... (see Frgure IA) used to produce me vectors that allowed generation of the transformants, Each strain also is named by the addition of an arbitrary number to desrgnate it as independently isolated line (i.e., more than one strain was usually isolated from the series of injections involving a given pe ...
Recombination and clonal groupings within Helicobacter pylori from
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NSPCD LABORATORIES - World Health Organization
NSPCD LABORATORIES - World Health Organization

... Interpretation of typing results Multiple isolates representing a single type are most appropriately designated “indistinguishable” No typing method confirms that entire genomes of two organisms are identical Indistinguishable vs. closely related vs. possibly related →Final assessment lies with int ...
Capillary Electrophoresis of Oligonucleotides
Capillary Electrophoresis of Oligonucleotides

... provided by a CGE analysis contains more information than just the ratio of the full-length product peak to the total. CGE trace data can be used to back-calculate average base coupling efficiencies for each synthesis if an unpurified oligonucleotide is analyzed. In addition, the length of an oligon ...
Janelle Nunan and David H. Small - Proteolytic processing of the
Janelle Nunan and David H. Small - Proteolytic processing of the

... producing a variety of A species with different C-termini. A40 and A42 (long A) are major products of -secretase activity. The location of the -secretase cleavage site is unusual as it resides within the transmembrane region. Several transmembrane proteins are known to be cleaved within or clo ...
array CGH - Unique The Rare Chromosome Disorder Support Group
array CGH - Unique The Rare Chromosome Disorder Support Group

... Balanced chromosome rearrangements, such as balanced translocations and inversions (where a section of a chromosome is inverted or reversed), will not be identified using array CGH. This is because balanced chromosome rearrangements do not result in any loss or gain of chromosome material. It will a ...
Chapter 14
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... 14.15 Lysogeny Requires Several Events • cII and cIII cause repressor synthesis to be established. – They trigger inhibition of late gene transcription. ...
ANSWER KEY
ANSWER KEY

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Exercise 8: Forensic Genetics/ Human Phenotypes
Exercise 8: Forensic Genetics/ Human Phenotypes

... example, samples collected from a victim and potential suspects, and compare them against unknown samples collected from the crime scene (e.g., blood, hair, skin fragments under a victim’s fingernails, etc.). Usually, the process includes extracting DNA from the samples, using PCR (polymerase chain ...
NIH Public Access
NIH Public Access

... in vivo and in vitro [5••,20]. Only the paternal MEA is methylated and silenced in the wild type endosperm, whereas, both parental alleles are methylated in the dme mutant endosperm, indicating maternal allele-specific hypomethylation [5••]. This finding suggests a mechanism of active DNA demethylat ...
Permutation Representation
Permutation Representation

... There is co-operation AND competition between them: •  Crossover is explorative, it makes a big jump to an area somewhere “in between” two (parent) areas •  Mutation is exploitative, it creates random small diversions, thereby staying near (in the area of) the parent ...
A series of vectors for fungal transformation
A series of vectors for fungal transformation

... modified polylinker in pBluescript II and pBC (pCB1519 and pCB1520, respectively) where the XhoI site is flanked on both sides by SmaI sites. Second, the selectable markers were cloned into common cloning vectors outside the polylinker, thus leaving the lacZ gene intact. Most of the restriction enzy ...
FLUORESCENT PROTEIN IN Escherichia coli
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Unit 1 Study Guide: Ecology and the Nature of Science
Unit 1 Study Guide: Ecology and the Nature of Science

... A. Explain what an enzyme is and the role it plays in chemical reactions. catalyst activation energy protein B. What would be the consequence if an organism did not have enzymes? C. Draw a diagram to represent how an enzyme catalyzes a substrate in its active site D. What factors can influence the a ...
Life 9e - Garvness
Life 9e - Garvness

... 43. People with sickle-cell disease have a(n) _______ abnormality. a. phenylalanine hydrolyase b. oncogene c. cholesterol transport d. hemoglobin e. None of the above Answer: d Textbook Reference: 15.3 How Do Defective Proteins Lead to Diseases? Page: 328 Bloom’s Category: 1. Remembering 44. Sickle- ...
powerpoint
powerpoint

... • Sequencing of the genomes of more than 7,000 species was under way in 2010 • Recombinant DNA  nucleotide sequences from two different sources combined in vitro into the same DNA molecule ...
DEVELOPING MOLECULAR GENETIC MAPS Early plant mapping:
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... a) Use any population under study for which mapping data is available. Develop pools of individuals that are homozyogus for opposing alleles at a given locus or in a given region and screen the pools with molecular markers. Only markers closely linked to the markers used to make the pools will be de ...
Integration of the Classical and Molecular Linkage Maps of Tomato
Integration of the Classical and Molecular Linkage Maps of Tomato

... the species L. esculentum and mapped using intraspecific crosses. As the number of DNA polymorphisms detectable between genotypes of L. esculentum is very 1990; VAN DER BEEKet low (MILLERand TANKSLEY al. 1992), construction of an integrated mapof an entire chromosome is only attainable through linka ...
Increased transversions in a novel mutator colon cancer cell line
Increased transversions in a novel mutator colon cancer cell line

... base pair runs might permit local melting of the DNA duplex adjacent to the mispair, thereby preventing recognition by the MMR system. In this regard, bacterial MMR does not correct all base ± base mispairs with equal eciency. For example, base ± base mispairs which could result in transversions ar ...
5   end
5 end

... Codons: Triplets of Bases • The flow of information from gene to protein is based on a triplet code: a series of nonoverlapping, three-nucleotide words • These triplets are the smallest units of uniform length that can code for all the amino acids • Example: AGT at a particular position on a DNA st ...
Bio 125 Lab Week 9: Relating Changes in Form to Changes in Genes
Bio 125 Lab Week 9: Relating Changes in Form to Changes in Genes

... domestic cabbage kale kohlrabi wild cabbage these buds are found at the junction where leaf meets stem, and actually contain additional meristematic tissue (Figure 2). The meristems in vegetative axillary buds are called axillary meristems, and can create additional stem and leaf structures: this is ...
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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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