Biological Function
NADH eliminates potentially toxic hydrogen peroxide under aerobic growth conditions and represents an enzymatic defense available against H2O2-mediated oxidative stress. Second, the enzyme presents an additional mechanism for regeneration of the NAD+ essential to the strictly fermentative metabolism of this organism. The enzyme may also protect against exogenous H2O2 and contribute to bacterial virulence.
The actual function of NADH peroxidases and oxidases in plants is still unclear, but they could act in early signaling of oxidative stress through producing H2O2.
An alternative role may include regulation of H2O2 formation by NADH peroxidase and oxidase in cell wall loosening and reconstruction.
Read more about this topic: NADH Peroxidase
Famous quotes containing the words biological and/or function:
“It is not the literal past that rules us, save, possibly, in a biological sense. It is images of the past.... Each new historical era mirrors itself in the picture and active mythology of its past or of a past borrowed from other cultures. It tests its sense of identity, of regress or new achievement against that past.”
—George Steiner (b. 1929)
“No one, however powerful and successful, can function as an adult if his parents are not satisfied with him.”
—Frank Pittman (20th century)