We basically built out all of the systems that you need to drive these multi-step metabolic pathways cell-free, to have them run for long periods of time, because that's the goal, right? You don't want something that just works for a little bit, and then you publish, and so be it. You want something that's going to be robust, that's going to work for a long period of time. You can just walk away from it after you add things together, and that's the ideal.