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Histidine amino acid

Histidine amino acid


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Histidine amino acid

Histidine. Computer model of a molecule of the amino acid histidine (C6.H9.N3.O2). Atoms (solid spheres) are colour-coded: carbon (green), oxygen (red), hydrogen (grey) and nitrogen (blue). It is an essential amino acid (required in the diet), is common in haemoglobin and is essential for growth in infants. It is a precursor to histamine. Here, the zwitterion, an internal salt that forms in the body, is shown. The chemical groups characteristic of an amino acid, the amino (NH2) and the carboxyl (COOH) groups, have reacted together, forming an NH3 group (positively-charged, lower right) and a COO group (negatively-charged, lower right). At upper left is histidines imidazole ring group

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6294121

© DR TIM EVANS/SCIENCE PHOTO LIBRARY

Amino Acid Compound Compounds Computer Dietary Essential Graphics Histamine Histidine Ionic Isomer Models Molecular Graphic Molecules Nutrition Nutritional Organic Precursor Space Filled Sphere Spheres Structural Bio Chemistry Biochemical


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