aTyr Pharma, Inc., a biotherapeutics company, engages in the discovery and development of medicines based on novel immunological pathways in the United States. The company's lead therapeutic candidate is efzofitimod, a selective modulator of NRP2 that is in Phase II clinical trial for pulmonary sarcoidosis; and in Phase 1b/2a clinical trial for treatment of other interstitial lung diseases (ILDs), such as chronic hypersensitivity pneumonitis and connective tissue disease related ILD. It is also developing ATYR2810, a fully humanized monoclonal antibody that is in preclinical development for the treatment of solid tumors.