Which of the following receptor genes are the first to be rearranged in a double negative thymocyte?

Positive selection:

Before positive selection, T cells can express two different ___ chains and therefore can express two different TCR’s on their surface.

Which of the following is the least common known lineage of the T-cells?

What does “double negative” thymocyte refer to?

Which CDR’s in a TCR recognize and contact primarily the MHC helices?

Both B-cells and T-cells have up to 4 potential attempts to productively rearrange their heavy chain and β-chain genes respectively.

Which of the following thymocytes could express two α chains? 

Effector T cell homing to inflamed tissue is facilitated by _________ expression on the effector T cell surface.

Allelic exclusion at the α chain locus is tightly regulated and very rarely will a T-cell express a second α chain.