Clonal Selection Theory (F.Macfarlane Burnet) 0 pre-existence of of many different potential antibody producing cells each cell displays surface receptors for specific antigens antigen encounter selects cells What prevents recognition/destruction of self tissues?Clonal Selection Theory (F. Macfarlane Burnet) ◼ pre-existence of of many different potential antibody producing cells ◼ each cell displays surface receptors for specific antigens ◼ antigen encounter selects cells ◼ What prevents recognition/destruction of self tissues?