Process engineer monitors production-scale bioreactors containing insect cell cultures for the production of VaxSyn, an experimental AIDS vaccine. The vaccine is an engineered, recombinant form of the HIV protein gp160, which is a precursor to one of HIV's surface proteins. VaxSyn is genetically-engineered from the baculovirus (an insect virus), with insect cell cultures used in the scale-up process. The vaccine is being developed by MicroGeneSys and is undergoing trials as a treatment of HIV- positive patients & as a potential vaccine against HIV infection.