Replication characteristics of OV-IA82Δ113 and OV-IA82Δ116 in OFTu cells. One step growth curves were performed in OFTu cells. Statistics showed that there was no significant difference between wild type and mutant viruses (P > 0.05). Data represent the averages of the results of three independent experiments. Error bars show standard deviations. Diamond: OV-IA82; Square: OV-IA82 Δ113; Triangle: OV-IA82Δ116.