Once a thymocyte has productively rearranged a ?-chain gene, which of these event(s) can occur subsequently? (Select all that apply.)
a. ? binds to pT? and is expressed on the cell surface with the CD3 complex and ? chain.
b. Rearrangement of ?-, ?-, and ?-chain genes ceases as a result of the suppression of expression of RAG-1 and RAG-2.
c. The pre-T cell proliferates and produces a clone of cells all expressing an identical ? chain.
d. Expression of CD34 and CD2 gives rise to double-positive thymocytes.
e. ?-, ?-, and ?-chain loci rearrange simultaneously.
a, b, c, e
You might also like to view...
A food rich in calcium is
A. low-fat milk. B. lean meat. C. nuts. D. apples.
A group of approximately normally distributed data has a standard deviation of 11.5 and a mean of 250. Calculate the +/-2 standard deviation range for the data.
What will be an ideal response?
Which treatment for a heart attack requires threading of a narrow tube or catheter through an artery to the heart?
a. defibrillation b. beta-blocking c. angina pectoris d. balloon angioplasty e. coronary bypass
The expression of a person's genuine feelings and beliefs best describes which of the following?
a. self-actualization b. self-assertiveness c. self-concept d. self-esteem