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Get it now - Wichita State University
Get it now - Wichita State University

... As you know, the DNA molecule can be compared with a zipper which can be opened up to allow replication and transcription. Scientist have found that there are several bacterial proteins called enzymes, or, more specifically, restriction enzymes, that have the ability to cut both strands of the DNA m ...
Banana DNA Extraction Lab
Banana DNA Extraction Lab

... The process of isolating DNA from a cell is the first step of many laboratory procedures in biotechnology. The scientist must be able to separate the DNA from the unwanted substances of the cell gently enough so that the DNA is not broken up and sheared. A “filtrate” is made of bananas and treated w ...
Composition and structure of DNA and RNA and differences
Composition and structure of DNA and RNA and differences

Forensic Science: An Introduction
Forensic Science: An Introduction

... tandem repeat sites and then run them on a gel electrophoresis • A Southern blot was then performed and radioactive probes were hybridized to help visualize the RFLPs ...
BIO113H - willisworldbio
BIO113H - willisworldbio

... from other cells that does not have the __________ DNA. After transformation the cells are treated with and ...
Fluorescence Kinetics in the Aid for DNA Mutations Analysis
Fluorescence Kinetics in the Aid for DNA Mutations Analysis

... concentrations high enough to saturate the available double stranded binding sites without inhibiting amplification. This characteristic assures product saturation and eliminates the potential for dye redistribution during the melt. The ability to use saturating levels of LCGreen and the tightly con ...
Genetic Engineering
Genetic Engineering

... • Biotechnology: process of manipulating organisms or their components for the purpose of making useful products. ...
Lecture #7 Date
Lecture #7 Date

Hotstart Taq DNA Polymerase
Hotstart Taq DNA Polymerase

... 產品包裝:Hotstart Taq DNA Polymerase , 500U (5U/ul) 10x Hotstart Taq Buffer , 1.4 mL ...
Slideshow
Slideshow

... of base pairs at certain locations on the DNA for comparison to a known sample ...
Chapter 15~ The Chromosomal Basis of Inheritance ______
Chapter 15~ The Chromosomal Basis of Inheritance ______

Semiquantitative RT-PCR analysis
Semiquantitative RT-PCR analysis

... are underlined. Non-labeled double-stranded oligonucleotides were also generated with the non-labeled single-stranded complementary oligonucleotides using the same methods. Binding reactions and electrophoresis have been described previously (Rokudai et al., 2002), and detection of the biotin-labele ...
Proc 16(4) Oct 03 web.indd
Proc 16(4) Oct 03 web.indd

Session 4 - OpenWetWare
Session 4 - OpenWetWare

... isopropanol and ethanol to precipitate the DNA to an insoluble form and by selectively binding the DNA to silica beads. With the DNA firmly tied up, it can be washed to remove impurities. The final step is to elute the DNA from silica beads and re-dissolve it in water or the desired buffer solution. ...
ACTIVITY - genetic factors in aggression File
ACTIVITY - genetic factors in aggression File

... BE HELPFUL FOR YOU TO KNOW IT. ...
page 74-81
page 74-81

Slide 1 - Loyola Blakefield
Slide 1 - Loyola Blakefield

... • Produces gene-sized pieces of DNA in multiple identical copies. • Plasmids, circular DNA pieces separate from the main chromosome, are used • Human growth hormone is mass-produced this way ...
Lecture 10 Analyzing the DNA by array and deep sequencing (1)
Lecture 10 Analyzing the DNA by array and deep sequencing (1)

... many generations to yield different descendant chromosomes. If a genetic variant marked by the A on the ancestral chromosome increases the risk of a particular disease, the two individuals in the current generation who inherit that part of the ancestral chromosome will be at increased risk. Adjacent ...
1. Which of the following enzymes will untangle DNA? A
1. Which of the following enzymes will untangle DNA? A

... 21. Adenine, thymine, guanine, and cytosine are what components of DNA? A) Hydrogen bonds B) Sugar moieties C) Phosphodiester groups D) Nitrogen bases 22. The movement of DNA from one bacterium to another through the activity of bacteriophages is called: A) conjugation B) transformation C) transduc ...
and Post-assessment multiple choice questions
and Post-assessment multiple choice questions

... 4. Only a small amount of DNA is collected from any particular soil or water sample. However, the amount of DNA collected is insufficient to perform the necessary experiments to analyze for the presence of the antibiotic resistance gene. What method could be utilized to increase the amount of DNA? A ...
Introduction to Biotechnology
Introduction to Biotechnology

... engineering is? How does it relate to biotechnology? ...
Ch. 16 Molecular Basis Heredity AND Replication Activity
Ch. 16 Molecular Basis Heredity AND Replication Activity

... Morgan: genes located on chromosomes Griffith: bacterial work; transformation: change in genotype and phenotype due to assimilation of external substance (DNA) by a cell Avery: transformation agent was DNA ...
DNA Replication
DNA Replication

... moves around the circle in both directions until complete. ...
THE GENOMIC SEQUENCING TECHNIQUE George M. Church and
THE GENOMIC SEQUENCING TECHNIQUE George M. Church and

Powerpoint Presentation: DNA Supercoiling
Powerpoint Presentation: DNA Supercoiling

< 1 ... 166 167 168 169 170 171 172 173 174 ... 222 >

Comparative genomic hybridization



Comparative genomic hybridization is a molecular cytogenetic method for analysing copy number variations (CNVs) relative to ploidy level in the DNA of a test sample compared to a reference sample, without the need for culturing cells. The aim of this technique is to quickly and efficiently compare two genomic DNA samples arising from two sources, which are most often closely related, because it is suspected that they contain differences in terms of either gains or losses of either whole chromosomes or subchromosomal regions (a portion of a whole chromosome). This technique was originally developed for the evaluation of the differences between the chromosomal complements of solid tumor and normal tissue, and has an improved resoIution of 5-10 megabases compared to the more traditional cytogenetic analysis techniques of giemsa banding and fluorescence in situ hybridization (FISH) which are limited by the resolution of the microscope utilized.This is achieved through the use of competitive fluorescence in situ hybridization. In short, this involves the isolation of DNA from the two sources to be compared, most commonly a test and reference source, independent labelling of each DNA sample with a different fluorophores (fluorescent molecules) of different colours (usually red and green), denaturation of the DNA so that it is single stranded, and the hybridization of the two resultant samples in a 1:1 ratio to a normal metaphase spread of chromosomes, to which the labelled DNA samples will bind at their locus of origin. Using a fluorescence microscope and computer software, the differentially coloured fluorescent signals are then compared along the length of each chromosome for identification of chromosomal differences between the two sources. A higher intensity of the test sample colour in a specific region of a chromosome indicates the gain of material of that region in the corresponding source sample, while a higher intensity of the reference sample colour indicates the loss of material in the test sample in that specific region. A neutral colour (yellow when the fluorophore labels are red and green) indicates no difference between the two samples in that location.CGH is only able to detect unbalanced chromosomal abnormalities. This is because balanced chromosomal abnormalities such as reciprocal translocations, inversions or ring chromosomes do not affect copy number, which is what is detected by CGH technologies. CGH does, however, allow for the exploration of all 46 human chromosomes in single test and the discovery of deletions and duplications, even on the microscopic scale which may lead to the identification of candidate genes to be further explored by other cytological techniques.Through the use of DNA microarrays in conjunction with CGH techniques, the more specific form of array CGH (aCGH) has been developed, allowing for a locus-by-locus measure of CNV with increased resolution as low as 100 kilobases. This improved technique allows for the aetiology of known and unknown conditions to be discovered.
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