B Cell Receptor

• Is a transmembrane receptor protein that is present in multiple identical copies on the outer membrane surface of B cells 
• Development is initiated by the synthesis of a functional pre-B cell receptor or pre-BCR, which is made up of 2 immunoglobulin heavy chains and 2 surrogate light chains that cooperate with signaling molecules IgA and IgB
• Is capable of recognizing soluble antigens

T Cell Receptor 

• Is an antigen recognizing molecule present in multiple identical copies on the outer membrane surface of T cells
• Plays a key role in initiating an immunological response on recognizing foreign particles known as antigens 
• Development occurs as a result of the recombination of genes that encode TCRs before encountering antigens
• Is not capable of recognizing and binding antigen directly
• Works by recognizing short peptide fragments of pathogen protein antigens that are bound to MHC Class I and MHC Class II molecules on the membrane surface of other cells