Allergens are presented by antigen-presenting cells to specific T cells using which of the following? A - VCE - SSCE Biology - Question 22 - 2023 - Paper 1

Allergens are typically presented by antigen-presenting cells (APCs) to T cells through major histocompatibility complex (MHC) proteins. MHCs play a crucial role in the immune response by displaying peptide fragments (which can include components of allergens) on their surfaces, allowing T cells to recognize them and initiate an immune response.

In detail, MHC class II proteins are particularly important in presenting antigens to CD4+ T helper cells, which are essential in orchestrating immune responses. Thus, the correct answer is:

D. major histocompatibility complex proteins.