TCR signaling requires the presence of co-receptors, such as CD4 or CD8, to amplify the activation signal

The TCR can recognize free-floating antigens in the bloodstream without the requirement for antigen presentation by MHC

TCRs consist of an alpha and a beta chain in the majority of T cells, forming the classic TCR structure

Each T cell expresses a unique TCR, allowing for a diverse repertoire capable of recognizing a wide variety of antigenic peptides

TCRs are responsible for recognizing and binding to specific antigens presented by MHC molecules on antigen-presenting cells