response to unfolded protein, response to organic substance, response to protein stimulus,
Secreted . Endoplasmic reticulum lumen . Sarcoplasmic reticulum lumen . Retained in the endoplasmic reticulum (ER), and sarcoplasmic reticulum (SR) under normal conditions (PubMed:22637475). Up-regulated and secreted by the ER/SR in response to ER stress and hypoxia (PubMed:22637475, PubMed:29497057). .
Testis,