Integrantes: Verónica Martinez Jasbleidy Bohorquez Yensy Sequeda Southern Blot y. Northern Blot Técnicas de Hibridación Técnicas basadas. Las posiciones de hibridación de la sonda radiactiva sobre la membrana del ensayo de Southern se detectan mediante autorradiografía. TIPOS DE HIBRIDACIÓN En solución o fase líquida El soporte o fase sólida Southern blot A continuación el filtro se incuba durante un tiempo con la sonda.

Author: Akir Tokasa
Country: Tanzania
Language: English (Spanish)
Genre: Education
Published (Last): 2 January 2014
Pages: 431
PDF File Size: 20.63 Mb
ePub File Size: 11.90 Mb
ISBN: 619-5-61693-261-3
Downloads: 48533
Price: Free* [*Free Regsitration Required]
Uploader: Satilar

So the fragments are soithern move down the gel and they’re gonna basically be separated based on size and based on charge. Both copies of chromosome 5 are shown, aligned side by side. So what’s gonna happen is when we expose the radio-labeled DNA to this filter paper, it’s going to anneal to our gene of interest.

So, “take the DNA and cleave it. By examining the genes simultaneously, we can now begin to identify and sion patterns that underlie cell physiology: And that will result in lots of these smaller pieces of DNA. Now Step 2, what do we do?

Southern blot – Wikipedia

Views Read Edit View history. A probe that hybridizes only to a single DNA segment that has not been cut by the restriction enzyme will produce a single band on a Southern blot, whereas multiple bands will likely be observed when the probe hybridizes to several highly similar sequences e.


It also allows for the fixation of the target-probe hybrids, required for analysis by autoradiography or other detection methods. Oligonucleotides are designed that are similar to the target sequence. Remember me on this computer. So higridacion imagine that we have a cup and it’s filled with DNA. For Southern blotting, the strands of the double-stranded DNA molecules on the paper must be separated before the hybridization process; this is done by exposing the DNA to alkaline denaturing conditions after the gel has been run not shown.

So that’s basically the first step. And let’s imagine that we do have Gene A, so let’s imagine that this piece of this DNA fragment was actually Gene A or our gene of interest.

Los hay de dos tipos principales: Log In Sign Up. Each probe produces two dots on each chromosome, since a hibirdacion chromosome has replicated its DNA and therefore contains two identical DNA helices. Here, red indicates an increase in expression; green is a decrease in blt. In this experiment, human fibroblasts were deprived of serum for 48 hours; serum was then added back to the cultures at time 0 and the cells were harvested for microarray analysis at different time points.

Gene expression and function. In the portion roarray shown, which represents the expression of yeast genes, s indicate that the gene in sample 1 is expressed at a higher level e corresponding gene in sample 2; green spots hlbridacion that on of the gene is higher in sample 2 than in sample 1. So Step 1, what we’re gonna do is we’re gonna take this DNA and we’re gonna cleave this.


Northern blot

The oligonucleotides are chemically synthesized, radiolabeled, and used to screen a DNA libraryor other collections of cloned DNA fragments. Help Center Find new research papers in: The probes have been chemically labeled and detected with fluorescent antibodies.

So, we want boot transfer it onto a filter. Skip to main content. When a DNA probe is being used to find DNAs with related, as well as identical, sequences, less stringent F C F conditions are used; hybridization is D B performed at a lower temperature, which allows even imperfectly paired double E helices to form. So, let’s just diagram that out.

And there’s osuthern lots and lots of those DNA and let’s imagine that I’m specifically interested in one gene. Courtesy of David C. The labeled are mixed and then allowed to hybridize to the microarray. Safety and ethics of DNA technologies.