Lysine

From Academic Kids

Lysine
Chemical name	(S)-2,6-Diamino- hexanoic acid
Abbreviations	Lys K
Chemical formula	C₆H₁₄N₂O₂
Molecular mass	146.19 g/mol
Melting point	215°C d
Specific rotation	+14.6°
Isoelectric point	9.47
pK_a	2.16 9.06 10.54
CAS number	[56-87-1]
EINECS number	200-294-2
SMILES	NCCCCC(N)C(=O)O
Missing image Amminoacido_lisina_formula.png Chemical structure of lysine
Disclaimer and references

Lysine is one of the 20 amino acids normally found in proteins. With its 4-aminobutyl side-chain, it is classified as a basic amino acid, along with arginine and histidine. It is an essential amino acid, and the human nutritional requirement is 1–1.5 g daily. A deficiency in lysine can result in a deficiency in niacin (which is a B Vitamin). This can cause the disease pellagra. Lysine can also be used as a nutritional supplement to help against herpes.

Lysine is the limiting amino acid in all cereal grains, but is plentiful in all pulses. Fish are also quite rich in lysine. Plants that contain significant amounts of lysine include:

Buffalo Gourd (10,130–33,000 ppm) in seed
Berro, Watercress (1,340–26,800 ppm) in herb.
Soybean (24,290–26,560 ppm) in seed.
Carob, Locust Bean, St.John's-Bread (26,320 ppm) in seed;
Black Bean, Dwarf Bean, Field Bean, Flageolet Bean, French Bean, Garden Bean, Green Bean, Haricot, Haricot Bean, Haricot Vert, Kidney Bean, Navy Bean, Pop Bean, Popping Bean, Snap Bean, String Bean, Wax Bean (2,390–25,700 ppm) in sprout seedling;
Ben Nut, Benzolive Tree, Drumstick Tree, Horseradish Tree, Jacinto (Sp.), Moringa, West Indian Ben (5,370–25,165 ppm) in shoot.
Lentil (7,120–23,735 ppm) in sprout seedling.
Asparagus Pea, Goa Bean, Winged Bean (21,360–23,304 ppm) in seed.
Lambsquarter (3,540–22,550 ppm) in seed.
Lentil (19,570–22,035 ppm) in seed.
White Lupine (19,330–21,585 ppm) in seed.
Black Caraway, Black Cumin, Fennel-Flower, Nutmeg-Flower, Roman Coriander (16,200–20,700 ppm) in seed.
Spinach (1,740–20,664 ppm) in slant.
Amaranth, Quinoa