The baculovirus-insect cell system is a valuable tool for the expression of
heterologous proteins. Due to limitations in the intracellular processing
environment, however, heterologous secreted and membrane proteins are often
insoluble, poorly processed, or contain 'non-human' modifications. Recent
attempts to modify the insect cell secretory pathway by overexpressing proc
essing factors have demonstrated the potential to overcome these limitation
s.