To utilize the advantage of both AcMNPV and BmNPV viruses, Creative BioMart provides a so called “HyNPV expression system”. Hybrid nuclear polyhedrosis virus (HyNPV) is the artificial hybrid virus of AcMNPV and BmNPV. In the HyNPV expression system, the protein expression is based on the HyNPV rather than AcMNPV or BmNPV. The hybrid virus can infect the hosts of both AcMNPV and BmNPV.