(ăp″ō-lĭp″ō-prō′tēn)
[Pronunciation]

Proteins imbedded in the outer shell of lipoproteins.
The apolipoproteins (Apo) are designated ApoAI, ApoAII, ApoAIV; ApoB48 and B100; ApoCI, ApoCII, ApoCIII; and ApoE. Except for ApoAII and ApoAIV, their metabolic functions are concerned with metabolizing and transporting lipoproteins. The functions of ApoAII and ApoAIV are not fully understood. All are synthesized in the liver; ApoE is synthesized also in macrophages, neurons, and glial cells.

See: lipoprotein