Lysine, a, e - diaminocaproic acid, diaminomonocarboxylic amino acid, colourless crystals, pier. weight 146,19:
The lysine is known in the form of two optically active D - and L - forms. Natural L. - L. (tpl of 224 — 225 °C, with decomposition) we will well dissolve in water, acids and the bases, it is bad — in alcohol. It is allocated in 1889 from a casein hydrolyzate, synthesized in 1902; is a part of almost all proteins of an animal and a phytogenesis (in a large number of L. contains in histones and protamina, in small — in proteins of cereals). L. — irreplaceable amino acid which is not synthesized in a human body and animals. Lack of L. in food slows down growth at children, at adults results in negative balance of nitrogen and violation of normal activity of an organism. Daily need for L. at adults makes 23 mg/kg of body weight, babies have 170 mg/kg. In the industry of L. receive microbiological synthesis; apply to enrichment of forages of page - x. animal and some foodstuff.