Daily Health Advices » DNA http://www.vmwaresecurity.com Complete Daily Health Advices and Medical Tips Sat, 28 Jan 2012 00:00:49 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Ancestor Virus on HIV-1 & HIV-2 http://www.vmwaresecurity.com/ancestor-virus-on-hiv-1-hiv-2.htm http://www.vmwaresecurity.com/ancestor-virus-on-hiv-1-hiv-2.htm#comments Mon, 28 Dec 2009 05:27:20 +0000 west baby http://www.vmwaresecurity.com/?p=167
Biologists concerned with the origin of species, family trees are the origin of species maps. On a pedigree you can see which species are closely related to each other and their common ancestor. A family can make based on appearance. So paleontologists managed on the basis of fossils to create a family tree showing how to read a prehistoric horse has evolved to a horse as we see trot in the pasture. But a tree does not only the origin of species to map out long since become extinct. You can also create a family tree of your own origins which are your direct ancestors. A tree containing yourself, your father and mother, your grandparents and your grandparents instance you can make under contract by using pictures. But probably a more reliable pedigree under the line of your DNA. Your DNA seems more like your father than that of your grandfather, because you’re more akin to your father or your grandfather. Now for a pedigree of the HIV DNA has been making a lot of different variants of the virus compared. To find out which “ancestor virus” on HIV-1 and HIV-2 belongs to biologists find a virus whose viral DNA resembles that of HIV-1 or HIV-2. They look as it were closely related viruses, like, cousins of HIV.
This nephews and niece viruses found in monkeys in Africa. The nephew of HIV called SIV. The S in SIV simian comes from the English word that means ape-like. There are already 26 known species of monkeys that carry the virus, ranging from chimpanzees. Monkeys infected with SIV themselves are not ill and get no monkey-AIDS, but the virus can transmit it to other monkeys and people. This is described further reading.

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]]> http://www.vmwaresecurity.com/ancestor-virus-on-hiv-1-hiv-2.htm/feed 18 Structure of The HIV http://www.vmwaresecurity.com/structure-of-the-hiv.htm http://www.vmwaresecurity.com/structure-of-the-hiv.htm#comments Wed, 16 Dec 2009 10:12:34 +0000 west baby http://www.vmwaresecurity.com/?p=141 The virion (particle infectivity) of HIV differs in structure from other retroviruses previously known. It is about 120 nm in diameter and is roughly spherical. Its genome is based physically in two  RNA copies (its sequence is as the corresponding messenger RNA) clothed by proteins, which form the nucleocapsid, and enclosed within a conical capsid, in turn surrounded by a shell of lipid bilayer , stolen first to the plasma membrane of the host cell, but endowed with self proteins. Inside the envelope there are enzymes in the virus, including a reverse transcriptase, an integrase – within the capsid – and a protease. The former is necessary for reverse transcription, DNA synthesis taking the viral RNA as template, and the second for the DNA so produced is integrated into the human genome became provirus.

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]]> http://www.vmwaresecurity.com/structure-of-the-hiv.htm/feed 8 Agent of the Emerging AIDS http://www.vmwaresecurity.com/agent-of-the-emerging-aids.htm http://www.vmwaresecurity.com/agent-of-the-emerging-aids.htm#comments Fri, 11 Dec 2009 09:23:56 +0000 west baby http://www.vmwaresecurity.com/?p=131 It was discovered and considered as the agent of the emerging AIDS epidemic by Luc Montagnier’s team in France in 1983. The virion is spherical, equipped with an envelope and a capsid protein. The genome of a chain of single-stranded RNA to be temporarily copied into DNA in order to multiply and integrate into the genome of the cell it infects. The protein antigens of the outer casing are coupled specifically with membrane proteins of infected cells, especially T4 lymphocytes.

The process of converting RNA into DNA is a major characteristic of retroviruses and is performed by reverse transcriptase enzyme actions. With the demonstration of reverse transcriptase, began in the 1970s the search for human retrovirus, which in 1980 allowed the isolation of leukemia virus of adult T cells, HTLV-I (R. Gallo and al.)

HIV has a diameter of about 100 nanometers. Its outside is the “deck”, a membrane that originally belonged to the cell where the virus emerged. On the cover is a virus protein, gp41, or “transmembrane glycoprotein. Gp41 is connected to gp120, which can bind to the CD4 receptor located on the surface of T lymphocytes to penetrate them. The nucleus has a “capsid”, composed by the p24 protein. Inside is the RNA, the form of HIV genetic information.

In December 2006, according to the World Health Organization, 39.5 million people with HIV worldwide, of which 24.7 million lived in sub-Saharan Africa.

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