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Mechanisms 1 and 2 represent [[hydride]] gain, in which the molecule gains what amounts to be one hydride ion. Mechanisms 3 and 4 [[Radical (chemistry)|radical formation]] and hydride loss. Radical species contain unpaired electron atoms and are very chemically active. Hydride loss is the inverse process of the hydride gain seen before. The final two mechanisms show [[nucleophilic addition]] and a reaction using a carbon radical.
{|
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|[[File:Hydride Transfer A.jpg|400px|thumb|left|Mechanism 1. Hydride transfer occurs by addition of H+ and 2 e−]]
|[[File:Hydride Transfer B.jpg|400px|thumb|right|Mechanism 2. Hydride transfer by abstraction of hydride from NADH]]
|-
|[[File:Radical Formation with FAD.jpg|400px|left|thumb|Mechanism 3. Radical formation by electron abstraction]]
|[[File:Hydride Loss using FAD.jpg|400px|right|thumb|Mechanism 4. The loss of hydride to electron deficient R group]]
|-
|[[File:Nucleophilic Substitution using FAD.jpg|400px|left|thumb|Mechanism 5. Use of nucleophilic addition to break R1-R2 bond]]
|[[File:Radical Reaction with FAD.jpg|400px|right|thumb|Mechanism 6. Carbon radical reacts with O2 and acid to form H2O2]]
|}
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Translations:Flavin adenine dinucleotide/13/en - Revision history

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