Ligation of Ag receptors in T and B lymphocytes initiates signal transduction cascades which alter the expression of genes that regulate cellular proliferation and differentiation .
ligation of ag receptors in t and b lymphocytes initiates signal transduction cascades which alter the expression of genes that regulate cellular proliferation and differentiation .
O O B-protein_molecule I-protein_molecule O O O O O O O O O O O O O O O O O B-other_name I-other_name O B-other_name O