The responsible transport gene that allows the production of lemon acid in large quantities was recently discovered. A breakthrough!
Membrane transport proteins play a key role in several metabolic pathways. They transport either actively or passively ions or biomolecules, such as metabolites, across the membranes. The construction of efficient cell factories, to produce valuable metabolites, requires a deeper understanding of transport capabilities. However, to understand these mechanisms, suitable protein production systems and membrane-like environments need to be developed in which full protein functionality is maintained.