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Keywords:

  • Heme proteins;
  • Nitric oxide;
  • Peroxynitrite;
  • Radicals;
  • Signal transduction

Abstract

Recent years have seen a massive growth of interest in the biological effects of nitric oxide (NO): It acts as a signaling molecule in blood vessels and the brain, and as a defense against pathogens in the immune system. Discussed are the chemical events underlying the physiology of this versatile little molecule.