Two distinct lineages of T cells can be identified based on their expression of α:β versus γ:δ T-cell receptors. A deficiency in the signaling receptor Notch1 would result in

Tumors result from which important processes:

Sixty percent of double-negative thymocytes are considered immature T cells. This term is used because these T cells lack __________ receptors.

Which of the following represent double negative 1 (DN1)

Anergic B cells

Mu chain is expressed at which stage of B cell development?

WHich of the following is NOT a component released from cytotoxic T cells?

Cytotoxic T cells that lack expression of perforin are more defective in killing target cells than those that lack granzymes

Which of the following correctly describes events necessary for naive T cell entry in to the lymph node?

The pre-B cell receptor consists of: