"Oh. Surely. We use auxotrophic E. coli , they’re homoserine auxotrophs mostly, though we use double auxotrophy if we’re trying anything ticklish.... And the fermenters, the tower rigs, those are saccharomyces.... It’s a standard strain, Pruteen copyright, nothing very advanced, just tried-and-true scop technology. At eighty percent capacity, we pump about fifteen metric tons per rig per day, dry weight.... Of course we don’t leave it raw, though. We do a lot of what they call cosmetics—palate work."