Definitions for fadfæd
This page provides all possible meanings and translations of the word fad
fad, craze, furor, furore, cult, rage(noun)
an interest followed with exaggerated zeal
"he always follows the latest fads"; "it was all the rage that season"
A phenomenon that becomes popular for a very short time.
a hobby ; freak; whim
Flavin adenine dinucleotide
In biochemistry, flavin adenine dinucleotide is a redox cofactor involved in several important reactions in metabolism. FAD can exist in two different redox states, which it converts between by accepting or donating electrons. The molecule consists of a riboflavin moiety bound to the phosphate group of an ADP molecule. The flavin group is bound to ribitol, a sugar alcohol, by a carbon-nitrogen bond, not a glycosidic bond. Thus, riboflavin is not technically a nucleotide; the name flavin adenine dinucleotide is a misnomer. FAD can be reduced to FADH₂, whereby it accepts two hydrogen atoms: FAD accepts two electrons and two protons to become FADH₂. FADH₂ can then be oxidized to the semireduced form FADH by donating one electron and one proton. The semiquinone is then oxidized once more by losing an electron and a proton and is returned to the initial quinone form. FAD is an aromatic ring system, whereas FADH₂ is not. This means that FADH₂ is significantly higher in energy, without the stabilization that aromatic structure provides. FADH₂ is an energy-carrying molecule, because, if it is oxidized, it will regain aromaticity and release all the energy represented by this stabilization.
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