PMA , but not Ara-C or ceramides , activated ERK MAPKS , in Jurkat and EL4 .
pma , but not ara-c or ceramides , activated erk mapks , in jurkat and el4 .
B-other_organic_compound O O O B-other_organic_compound O B-other_organic_compound O O B-protein_molecule I-protein_molecule O O B-cell_line O B-cell_line O