Methods, systems, and devices are disclosed for in vivo production or biosynthesis of metabolites in foreign cells using the combination of (i) one or more ferredoxin dependent enzyme(s) and (ii) a ferredoxin (Fd)/ferredoxin-NADP.sup.+ reductase (FNR) system. The ferredoxin dependent enzymes and the Fd/FNR system are from the same species or from a different but matching species.