Reducing equivalent

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In biochemistry, the term reducing equivalent refers to any of a number of chemical species which transfer the equivalent of one electron in redox reactions.[1] Examples of reducing equivalents are:

  • A lone electron (for example in reactions involving metal ions)
  • A hydrogen atom (consisting of a proton and an electron)
  • A hydride ion (:H) which carries two electrons (for example in reactions involving NAD)


  1. ^ Jain, J.L. (2004). Fundamentals of Biochemistry. S. Chand. ISBN 81-219-2453-7.