Kezar Life Sciences, Inc., a clinical-stage biotechnology company, engages in the discovery and development of novel small molecule therapeutics to treat unmet needs in immune-mediated diseases and cancer in the United States. The company's lead product candidate is zetomipzomib (KZR-616), a selective immunoproteasome inhibitor that is in Phase 2b clinical trials for various indications, including lupus nephritis, dermatomyositis, and polymyositis; Phase 1b clinical trials in systemic lupus erythematosus; and completed Phase 2a clinical trials in lupus nephritis. Its preclinical products include KZR-261, a novel first-in-class protein secretion inhibitor for the treatment of tumors resistant to traditional chemotherapeutics. Kezar Life Sciences, Inc. was incorporated in 2015 and is headquartered in South San Francisco, California.