Proteine (Gr. , first), a name given by Mulder to a product obtained by the action of potash on albuminoids, such as fibrine, albumen, and caseine, of which he considers it the base, the other factor being varying quantities of sulphimide, (NH2)2S, and phosphimide, NH2P. It has, however, never been procured free from sulphur, and Liebig regarded Mulder's theory as not established, considering it only an albuminous substance somewhat modified. But the bodies of which Mulder considered it the base are commonly called proteine bodies, or proteids, and are divided, according to Hoppe-Seyler, into seven classes, viz.: 1. Albumens (soluble in water): a, serum albumen; b, egg albumen. 2. Globulines (insoluble in water, but soluble in dilute acids and alkalies, and very dilute solutions of chloride of sodium and other neutral salts): a, myosine; ft, globuline; c, fibrinogen; d, vitelline. 3. Derived albumen (insoluble in water and solutions of chloride of sodium, but soluble in dilute acids and alkalies): a, acid albumen; ft, alkali albumen or caseine. 4. Fibrine (insoluble in water, sparingly soluble in dilute acids and alkalies and in neutral saline solutions). (See Fibrine.) 5. Coagulated proteid, formed by heating neutral solutions of proteids, or by the action of alcohol. 6. Amyloid substance, or lardaceine, a substance deposited in the liver and other organs in certain diseases. . 7. Peptones, bodies formed from albuminous substances by the action of the gastric juice; they are found only in the stomach and small intestines, disappearing as soon as they enter the lacteal vessels.