Automated linkage of proteins and payloads producing monodisperse conjugates.

Controlled protein functionalization holds great promise for a wide variety of applications. However, despite intensive research, the stoichiometry of the functionalization reaction remains difficult to control due to the inherent stochasticity of the conjugation process. Classical approaches that exploit peculiar structural features of specific protein substrates, or introduce reactive handles mutagenesis, are by essence limited in scope or require substantial protein reengineering.