Developed at the European Molecular Biology Laboratory (EMBL), ComplexLink™ is a system of polyprotein production combined with co-production of sequence-specific proteases that co-translationally cleave the polyprotein into functional monomeric subunits. The technology provides unique advantages over existing expression systems for production of multiprotein complexes where subunit stoichiometry is difficult to control. The technology was applied to produce recombinant influenza polymerase complex from a self-processing polyprotein, as recently published in Nature.