in Body Fluids and Circulation (Cardiovascular System, Circulatory system) by

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Fibrinogen, globulins and albumins are the three major types of plasma proteins.

Globulins serve as antibodies and transport substances. Globulins as a diverse group of proteins transport various substances in the blood and primarily are involved in defense mechanisms of the body.

The globulins are of three types called alpha, beta, and gamma globulins.

Alpha and beta globulins - These globulins combine and help transport substances (hormones, cholesterol, and iron) in the blood. Several beta globulins bind to lipid molecules (cholesterol).

Gamma globulins - These antibodies are produced by white blood cells called lymphocytes. Gamma globulins function as part of the body’s defense system and fight with disease-causing pathogen to protect against illness.