T-Dependent mechanism IL2 4-6 stimulate T-helper cells to multiply These t cells associate with b cells that have correct Ag MHC II complex and secrete B cell growth factors(BCGf that cause B cells to multiply BIOL 533 7 Lecture 7BIOL 533 7 Lecture 7 T-Dependent Mechanism • IL2 4-6 stimulate T-helper cells to multiply – These T cells associate with B cells that have correct Ag— MHC II complex and secrete B cell growth factors (BCGF) that cause B cells to multiply