What is the role of CD40L expressed on activated CD4+ T cells?

What is the end result of Ig gene rearrangement during B cell maturation?

Why are mice commonly used as animal models in immunology research?

What is the role of RAG-1 and RAG-2 in V(D)J recombination?

Snookie would like to examine the role of BAX in a rare form of bone cancer. Which of the following experimental designs is the most reasonable first step?

A C57BL/6 mouse was immunized against antigen X. After two weeks the mouse was sacrificed. The spleen was then removed and broken up into a single cell suspension. The single cell suspension was divided into three wells, Wells 1, 2, and 3. To Well 2 antigen X was added, to Well 3 antigen Y (an unrelated antigen) was added, and no additional manipulations were done to well 1. Based on this experimental procedure, which of the following conclusions below is most correct.

What was the key finding of the Tonegawa experiment that used restriction endonucleases?

What determines whether an immunoglobulin is secreted or membrane-bound?

What is junctional flexibility in the context of V(D)J recombination?

What is the Lymphocytic Choriomeningitis Virus (LCMV) experiment used to demonstrate?