Interleukin-4 ( IL-4 ) and interleukin-12 ( IL-12 ) control the differentiation of T-helper cells .
interleukin-4 ( il-4 ) and interleukin-12 ( il-12 ) control the differentiation of t-helper cells .
B-protein_molecule O B-protein_molecule O O B-protein_molecule O B-protein_molecule O O O O O B-cell_type I-cell_type O