<P> An electron acceptor is a chemical entity that accepts electrons transferred to it from another compound . It is an oxidizing agent that, by virtue of its accepting electrons, is itself reduced in the process . Electron acceptors are sometimes mistakenly called electron receptors . </P> <P> Typical oxidizing agents undergo permanent chemical alteration through covalent or ionic reaction chemistry, resulting in the complete and irreversible transfer of one or more electrons . In many chemical circumstances, however, the transfer of electronic charge from an electron donor may be only fractional, meaning an electron is not completely transferred, but results in an electron resonance between the donor and acceptor . This leads to the formation of charge transfer complexes in which the components largely retain their chemical identities . </P>

An important example of an electron acceptor molecule that functions in glycolysis is