試題詳解

29. Which of the following statement about regulatory T cells is true?
(A) Regulatory I cells is a subset of CD8 T cells.
(B) The expression of the transcription factor FoxP3 is the hallmark of regulatory T cells.
(C) Regulatory I cells do not mediate immune tolerance.
(D) Regulatory T cells usually represent more than 50% of the T cells in circulation in humans.