Publisher Summary This chapter focuses on two sets of molecules involved in the
proliferation and differentiation of highly purified human B lymphocytes: the molecules
secreted or expressed by T cells and other accessory cells and the receptor molecules
expressed on B cells. The immune response results from the precisely regulated
proliferation and differentiation of individual clones of lymphocytes. The main function of B
lymphocytes is to produce immunoglobulins of which nine different isotypes have been …