ID   1.2.99.6
DE   Carboxylate reductase.
CA   An aldehyde + acceptor + H(2)O = a carboxylate + reduced acceptor.
CF   Tungsten.
CC   -!- Methyl viologen can act as acceptor.
CC   -!- In the reverse direction, non-activated acids are reduced by reduced
CC       viologens to aldehydes, but not to the corresponding alcohols.
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