LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Angiotensin II molecule. Computer model showing the structure of a molecule of the hormone Angiotensin II. Atoms are represented as colour-coded spheres (carbon: large grey, hydrogen: small grey, oxygen: red, nitrogen: blue) with the bonds between them as sticks. Angiotensin is produced and released into the circulation mainly by the liver. It causes blood vessel constriction (vasoconstriction), increased blood pressure, and release of aldosterone from the adrenal cortex. Angiotensin II is formed from angiotensin I by the action of Angiotensin-converting enzyme (ACE).
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