TBP and TAPs

TBP (tocopherol binding protein)

15 kDa protein

Expressed in most tissues, such as liver, heart.

Main function proposed:

It selectively transfers α-tocopherol within the cell organelles.

Figure
Intracellular vitamin E transport

TAPs (tocopherol associated proteins)

46 kDa protein

Expressed in most tissues

Proposed function:

May be involved in intracellular transport of α-tocopherol.