4 výsledky
Selenium is essential trace element, sulphur analogue with high chemical activity, component of some selenoproteins and enzymes: glutathione peroxidase and other peroxidases, blood and tissue proteins. As to their biological action mechanism selenium and its compounds are antioxidants. Selenium is
Selenoproteins have been identified in a diverse range of organisms, including bacteria and animals. Their occurrence and role in the plant kingdom are, however, less well-understood. This work investigated the water-soluble selenium-containing proteins extracted from a selenium-accumulating plant
During the selenium assimilation pathway, inorganic selenate and selenite are reduced to form selenocysteine (Sec). Tolerance to selenium in plants has long been attributable to minimizing the replacement of cysteine with selenocysteine, which can result in nonspecific selenoproteins that are
BACKGROUND
Human requirements for dietary selenium are met mainly by crops. However, excessive uptake of selenium in plants can restrict growth, and its toxicity has been postulated to target roots. Selenite toxicity can be attributed to its assimilation into selenocysteine, which can replace