Which one of the following molecules is important for the production of IgE antibodies?

Question

Quizplus · Accepted Answer

Cytokines play essential roles in regulating the switch to particular heavy chain isotypes.IFN-$\gamma$ is important in switching to the IgG isotype (specifically IgG3),whereas TGF-F1F1F1S1?F1F1F10 is a stimulator of IgA production.The cytokine that promotes IgE production is IL-4,but this is not an answer choice.However,the process of isotype switching in general is known to depend on signaling through CD40L-CD40,and is also dependent on the activity of the enzyme activation-induced deaminase (AID).CD28 is a costimulatory molecule that is important for T cell activation and CD40L up-regulation.However,other costimulatory molecules are also present on T cells that can cause up-regulation of CD40L.IL-2 is a growth factor cytokine for T cells.

Which One of the Following Molecules Is Important for the Production