alph,alpha TTP,alpha-tocopherol transfer protein,alpha-TTP.
Binds alpha-tocopherol, enhances its transfer between separate membranes, and stimulates its release from liver cells. Binds both phosphatidylinol 3,4-bisphosphate and phosphatidylinol 4,5-bisphosphate, the resulting conformation change is important for the release of the bound alpha-tocopherol.