Adagene Inc. has announced a research collaboration with Sanofi SA, to find “masked” monoclonal and bispecific antibodies that are safer than marketed drugs in oncology, in a deal worth up to $2.5 billion plus royalties. San Diego and Suzhou, China-based Adagene will generate masked versions of Sanofi antibodies, taking responsibility for early stage research activities using its Safebody technology. Sanofi will be responsible for later-stage research and all clinical, product development and marketing activities.