Sf9 cells adapted to grow in Grace’s insect cell medium (Invitrogen, USA) containing 10% fetal bovine serum (FBS) (Gibco, USA) and
1% penicillin-streptomycin (Gibco, USA). Cells were maintained at 27 °C in a non-humidified incubator. Sf9 cells cultured in T-25 flask and
after 3-4 days reached 90-100% confluency. Cells were washed with PBS and detached with a scraper before transfection.