JIM DOWDALLS / SCIENCE PHOTO LIBRARY JIM DOWDALLS / SCIENCE PHOTO LIBRARY
Free radical cellular damage. Artwork of oxygen free radicals (black stream, bottom left to centre right) damaging cellular DNA (deoxyribonucleic acid, white, centre right). The DNA has originated from the cell nucleus (purple, lower right) and a sectioned cell membrane surrounds it. Vitamin C (blue particles) reduces this damage. A sectioned blood vessel wall runs vertically through centre. Particles of low-density lipoprotein cholesterol (LDL, orange) are oxidised by free radicals, and protected by vitamin E (yellow hexagons). Oxidised LDL is removed by white blood cells (leucocytes, pink/grey, upper centre). These LDL-filled cells form atherosclerotic plaque (brown, upper right).
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