POLH and infection: This fusion antibody was expressed under the control of the polh promoter or in the context of TB3. Sf9 insect cells were infected with each baculovirus in suspension at a m.o.i. of 0.1, and cell extracts taken at a range of times post-infection were resolved in SDS-PAGE gels and analysed by Western blot using an anti-GFP antibody.