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CD4 protein molecule

CD4 protein molecule

A617/0108

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Credit

DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY

Caption

CD4 protein. Computer model of a molecule of the CD4 protein that plays a vital role in the immune system. Protein structural units are the coloured balls, each colour for a different amino acid. The CD4 protein is found on the surface of white blood cells called T-helper cells. As a surface protein, CD4 binds to the surface proteins on other cells and pathogenic micro-organisms. This interaction helps the T-helper cells to recognise a threat and initiate an immune response. CD4 also binds to HIV (the human immunodeficiency virus) as part of the process by which HIV kills the T-helper cells and compromises the immune system. CD4 is a monomeric glycoprotein chain of around 450 amino acids.

Release details

Model release not required. Property release not required.

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