Protein Delivery Inc. is one of a growing class of research and development companies specializing in oral administration of biotechnology products. The heart of the company's system is a polymer process that binds a protein or peptide therapeutic to a biologically inert molecule.

This conjugate of polymer and therapeutic, called the Proteimer system, is designed to enter the upper gastrointestinal (GI) tract with minimal loss in the structure of the therapeutic, preserving as much therapeutic activity as possible while it passes through the wall of the small intestine into the bloodstream.