Lysine
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
This article from the 1928–1936 Soviet Medical Encyclopedia defines lysine as an alpha, epsilon-diaminocaproic acid found in the hydrolysates of most animal and plant proteins. It notes its properties, such as yielding cadaverine upon putrefaction, and highlights its essential role in the normal growth of animals.
Encyclopedia entry (1928–1936)
LYSINE, $\alpha,\epsilon$-diaminocaproic acid: H2N. CH2. CH2. CH2. CH2 . CH (NH2). COOH; natural d-lysine [$\alpha$]D20 = + 14° to 15.5° for a 2–5% solution of the hydrochloric salt. Free lysine has not been obtained in crystalline form. It is readily soluble in water and is not precipitated by silver nitrate or baryta water. For identification, the very sparingly soluble lysine picrate is best suited. Upon putrefaction, lysine yields cadaverine. Lysine is found in the hydrolysates of most animal and plant proteins. The presence of lysine is necessary for the normal growth of animals (see also Diamino acids).
Related articles
Mentioned in
Cite this page
“Lysine.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/lysine/