, Inc. engages in the development and commercialization of products to treat rare disease. It operates through the following segments: BioTherapeutics and Vaccines/BioDefense. The BioTherapeutics segment offers photodynamic therapy (SGX301) utilizing topical synthetic hypericin activated with safe visible fluorescent light for the treatment of cutaneous T-cell lymphoma. The Vaccines/BioDefense segment includes active development programs for RiVax, ricin toxin vaccine candidate, OrbeShield, GI acute radiation syndrome therapeutic candidate, and SGX943, melioidosis therapeutic candidate. The company was founded in 1987 and is headquartered Princeton, NJ.