The capacity of neonatal T cells to secrete interleukin-2 ( IL-2 ) has been reported to be variable .
the capacity of neonatal t cells to secrete interleukin-2 ( il-2 ) has been reported to be variable .
O O O B-cell_type I-cell_type I-cell_type O O B-protein_molecule O B-protein_molecule O O O O O O O O