Identify which of the following is not a characteristic of ?:? T cells. (Select all that apply.)
a. Some express a homodimer of the CD8 ? chain.
b. They do not express CD28.
c. They are subject to MHC restriction.
d. Most do not express either CD4 or CD8.
e. Most circulating cells do not enter secondary lymphoid tissue.
f. They undergo gene rearrangement.
g. They originate from the same precursor cells as do ?:? T cells.
h. Their response is solely dependent on the T-cell receptor.
i. They make up the minority of resident T cells in tissues.
j. Circulating cells express V?9:V?2.
c, h, i
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