DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Temozolomide chemotherapy drug molecule. Computer model of a molecule of the chemotherapy drug temozolomide. Atoms are represented as spheres and are colour-coded: carbon (yellow), hydrogen (white), nitrogen (blue) and oxygen (red). Temozolomide is used to treat brain cancers. It is an alkylating agent, a substance that adds alkyl groups to DNA (deoxyribonucleic acid) molecules and so prevents them from replicating. This interferes with the cancer cells' growth and eventually destroys them.
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