AG1, AGR1, ER protein 18, ER protein 19, ERP 18, ERP16, ERP19, hAG1, hTLP19, PDIA16, TLP19, TXNDC12,
ERp19 belongs to the thioredoxin superfamily. Members of this superfamily possess a thioredoxin fold with a consensus active-site sequence (CxxC) and have roles in redox regulation, defense against oxidative stress, refolding of disulfide-containing proteins, and regulation of transcription factors.