ADC manufacturing is a multistep process that can be divided into three distinct stages: cGMP production of the antibody, cGMP synthesis of the drug-linker complex, and conjugation to form an ADC. The conjugated antibodies undergo extensive purification and finished as ADC products upon the completion of fill-finishing. As a complex entity containing three components (monoclonal antibody, linker, and payload), the function of ADCs is highly sensitive to each component’s attributes. Due to clinical research on ADC drugs progresses and commercial demand surges, many companies turn to CDMOs (Contract Development, Manufacturing Organizations) for "end-to-end" services like develop, manufacture, and test ADCs. As an ADC contract manufacturer partner, ChemExpress provides comprehensive services across the entire ADC supply chain, from antibody, payload linker to conjugation and final drug product fill-finish.