About Plexium. Plexium is the premier, next-generation Targeted Protein Degradation (TPD) company focused on the discovery of TPD drugs which overcome limitations of conventional approaches to broaden the therapeutic potential of TPD. Plexium is pursuing monovalent degraders, including a new class of selective TPD drugs called “Direct Degraders.” Direct Degraders are small molecules that are designed to bind to a pathogenic protein in a manner th...