ID   1.3.2.4
DE   fumarate reductase (cytochrome).
CA   2 Fe(III)-[cytochrome c] + succinate = 2 Fe(II)-[cytochrome c] + fumarate
CA   + 2 H(+).
CC   -!- Contains a non-covalently bound FAD cofactor and four heme c groups.
CC   -!- The enzyme, characterized from the bacterium Shewanella
CC       frigidimarina, is a soluble periplasmic protein that functions as a
CC       terminal electron acceptor during anaerobic growth.
CC   -!- The direct electron donor is the membrane-bound tetraheme c-type
CC       cytochrome CymA (EC 7.1.1.8), which receives the electrons from the
CC       membrane quinol pool.
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