lysine (lī`sēn), organic compound, one of the 20 amino acids amino acid (əmē`nō)
..... Click the link for more information. commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is one of several essential amino acids needed in the diet; the human body cannot synthesize it from simpler metabolites. Young adults need about 23 mg of this amino acid per day per kilogram (10 mg per lb) of body weight. Lysine is found in particularly low concentrations in the proteins of cereals; wheat gluten, for example, is relatively poor in lysine. This deficiency in lysine is the reason for the failure of diets in some parts of the world that employ cereal protein as a sole source of essential amino acids to support growth in children and general well-being in adults. Attempts to develop lysine-rich corn have been partly successful. Once lysine is incorporated into protein, its basic side chain often provides a positive electrical charge to the protein, thereby aiding its solubility in water. Its side chain has also been implicated in the binding of several coenzymes biotin, is a member of the B complex; it was first isolated in 1935 from dried egg yolk, and its structure was established in 1942. Biotin is usually found attached to a lysine residue in certain enzymes, where it participates in reactions involving the transfer of carboxyl
..... Click the link for more information. (pyridoxal phosphate, lipoic acid, and biotin) to enzymes enzyme, biological catalyst . The term enzyme comes from zymosis, the Greek word for fermentation , a process accomplished by yeast cells and long known to the brewing industry, which occupied the attention of many 19th-century chemists.
..... Click the link for more information. . It also plays an important role in the functioning of histones histone (hĭs`tōn), any of a class of protein molecules found in the chromosomes of eukaryotic cells .
..... Click the link for more information. . The amino acid was first isolated from casein (milk protein) in 1889, and its structure was elucidated in 1902.

lysine

One of the essential amino acids, present in many common proteins. Its proportion in the proteins of some important food plants (including wheat and corn) is so small that populations dependent on these grains as the sole source of dietary protein suffer from lysine deficiency, affecting growth in children and general well-being in adults. It is used in biochemical and nutritional research, in pharmaceuticals, in fortified foods, and as a nutritional supplement and feed additive.

lysine (redirected from Lysl)

lysine

lysine
(redirected from Lysl)