tokens: However , C3 toxin alone or in combination with growth factors did not stimulate AP-1 : Luc activity and actually antagonized the synergistic activation of AP-1 : Luc observed in response to co-stimulation with growth factors and Ro-31-8220 .
folded_tokens: however , c3 toxin alone or in combination with growth factor do not stimulate ap-1 : luc activity and actually antagonize the synergistic activation of ap-1 : luc observe in response to co-stimulation with growth factor and ro-31-8220 .