DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Vitamin B4. Computer model of a molecule of the water-soluble vitamin B4 (adenine, C5.H5.N5). The atoms (solid tubes) of this organic molecule are colour-coded: carbon (yellow), hydrogen (grey) and nitrogen (blue). Adenine is obtained from complex carbohydrate foods such as honey. It is also found in fruits and fresh vegetables. It is an important cofactor in the energy-storing biochemistry of the body, especially the formation of the molecule ATP (adenosine triphosphate). Adenine deficiency symptoms would include blood and skin disorders. Small amounts of vitamins are an essential part of a healthy diet.
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