LEONARD LESSIN / SCIENCE PHOTO LIBRARY LEONARD LESSIN / SCIENCE PHOTO LIBRARY
Histamine. Computer artwork of a molecule of histamine, a chemical involved in skin inflammation. The atoms are depicted as spheres of dots joined by chemical bonds. The atoms are colour- coded: carbon (green), nitrogen (blue) and hydrogen (white). Histamine is derived from the amino acid histidine, and is mainly associated with the mast cells found in connective tissue. It causes dilation and increased permeability of small blood vessels. It is released in large quantities after damage to the skin, producing a characteristic red wheal and itching. Histamine is also released in and gives rise to the symptoms of allergic conditions such as asthma.
Model release not required. Property release not required.