Protagonist Therapeutics, Inc., a biopharmaceutical company, develops peptide-based drugs for hematology and blood disorders, and inflammatory and immunomodulatory diseases. It is developing Rusfertide (PTG-300), an injectable hepcidin mimetic that completed phase 2 clinical trials for the treatment of polycythemia vera and other blood disorders; and JNJ-2113, an orally delivered investigational drug to block biological pathways that completed phase 2b clinical trials for the treatment of moderate-to-severe plaque psoriasis; and PN-943, an orally delivered, gut-restricted alpha 4 beta 7 specific integrin antagonist completed a phase 2 clinical trials in patients with moderate to severe ulcerative colitis. The company has a license and collaboration agreement with Takeda to commercialize rusfertide; and JNJ Innovative Medicines to co-develop Interleukin-23 receptor antagonist compound JNJ-2113. Protagonist Therapeutics, Inc. was incorporated in 2006 and is headquartered in Newark, California. Address: 7707 Gateway Boulevard, Newark, CA, United States, 94560-1160