Prometheus Biosciences Incorporated develops and commercializes novel therapeutics and companion diagnostics products for the treatment of inflammatory bowel diseases. Its lead product is PRA023, a humanized IgG1 monoclonal antibody (mAb), which is in Phase IIa clinical trials for the treatment of ulcerative colitis and Crohn's disease, as well as systemic sclerosis-associated interstitial lung disease. Prometheus Biosciences was incorporated in 2016 and is headquartered in San Diego, CA.