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Noun, pl. globulins

1. A family of globular proteins that have higher molecular weights and water solubility values than the albumins. Some globulins are produced in the liver, while others are made by the immune system. Globulins, albumin, and fibrinogen are the major blood proteins. The normal concentration of globulins in the blood is about 2.6-4.6 g/dL. (

2. (Biochemistry) Any of a group of simple proteins, soluble in water only in the presence of salts, that are coagulated by heat; one of the two parts of hæmoglobin. (

3. Any of a group of simple proteins soluble in salt solutions and forming a large fraction of blood serum protein. The three principal subsets of globulin are alpha globulin, beta globulin, and gamma globulin, which are distinguished by their respective degrees of electrophoretic mobility (alpha having the greatest and gamma having the least). (Google Dictionary)

4. A family of proteins found in blood and milk and muscle and in plant seed. (

5. A simple globular protein which cannot be dissolved in pure water but which can be dissolved if a salt is added to the water. It can also be precipitated out of solution and into a solid with a solution of ammonium sulphate at 50% saturation. (

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