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Antioxidant glutathione . The yellow sphere is the redox-active sulfur atom that provides antioxidant activity, while the red, blue, white, and dark grey spheres represent oxygen, nitrogen, hydrogen, and carbon atoms, respectively. An antioxidant is a molecule capable of slowing or preventing th more

Flight feather

Flight feather (Milvus milvus) in flight, showing remiges and rectrices Flight feathers are the long, stiff, asymmetrically shaped, but symmetrically paired feather s on the wing s or tail of a bird ; those on the wings are called remiges (singular remex) while those on the tail are called rectri more

Charles Darwin

Charles Darwin Charles Robert Darwin (12 February 1809 – 19 April 1882 ) was an English naturalist . After becoming eminent among scientists for his field work and inquiries into geology , he proposed and provided scientific evidence that all species of life have evolved over time f more

Enzyme inhibitor

Enzyme inhibitor protease in a complex with the protease inhibitor ritonavir . The structure of the protease is shown by the red, blue and yellow ribbons. The inhibitor is shown as the smaller ball-and-stick structure near the centre. Created from PDB 1HXW . Enzyme inhibitors are molecule s that more

Amanita phalloides

Amanita phalloides Amanita phalloides (generally ), commonly known as the death cap, is a poisonous basidiomycete fungus , one of many in the genus Amanita . Widely distributed across Europe , A. phalloides associates with various deciduous and coniferous trees. In some cases, death cap has be more

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