C4b2a3b is which of the following: 

Binding of a cytokine to a receptor on the surface of a cell induces which of the following, leading to phosphorylation and signal transduction: 

Differentiation of Effector T Cells is initiated based on which of the following: 

In non-competitive immunassays the amount of label detected is ________ proportional to the amount of patient antigen present.

Match the following characteristic to the antibody isotype which it describes. Answer choices may be used once, more than once, or not at all.

Cytokines play a key role in the regulation of the immune system. As such, cytokines play an influential role in all of the following EXCEPT: 

Which of the following complement pathways requires the adaptive response (antibodies) for initiation?

Heterophile Antigens describes which relationship between two antigens:

The basic structure of an antibody is a tetrapeptide structure. The tetrapeptide structure consists of:

The smallest area on an antigen that elicits an immune response is known as a(n):