Upon entering the thymus, thymocytes are classified as double __________ with regard to coreceptor; before exiting as single-positive, naïve T cells, they pass through a period in which they are double ________
A. positive; negative
B. negative; positive
C. Both of these are true.
D. Neither of these are true.
E. Coreceptor expression state does not change in the thymus.
B
Health & Biomechanics
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