Illustration of the HIV retrovirus, black b/ground

Illustration of the HIV retrovirus, black b/ground

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Credit: MEHAU KULYK/SCIENCE PHOTO LIBRARY

Caption: HIV retrovirus. Schematic illustration of the structure of a retrovirus, such as the HIV-1 virus that causes AIDS. At centre are RNA strands (rainbow colours) making up the viral genetic material. The RNA is enclosed in a core protein shell (yellow). The outer envelope (blue) consists of a lipid bi-layer, with protein spikes (orange). In the HIV virus the spikes consist of a glycoprotein, gp120, and it is these that recognise CD4 markers on white blood T-cells, allowing the T-cells to become infected. The HIV virus kills T-cells after using them to reproduce its viral RNA, thus weakening the immune system of the human host.

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Keywords: aids virus, artwork, hiv virus, hiv-1, retrovirus, virus

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