part of part of occurs in occurs in endoplasmic reticulum maintenance of protein localization in endoplasmic reticulum bf protein-ER retention maintenance of protein localisation in endoplasmic reticulum retention of protein in endoplasmic reticulum biological_process retention of protein in ER protein-endoplasmic reticulum retention maintenance of protein location in endoplasmic reticulum Any process in which a protein is maintained in the endoplasmic reticulum and prevented from moving elsewhere. These include sequestration within the endoplasmic reticulum, protein stabilization to prevent transport elsewhere and the active retrieval of proteins that escape the endoplasmic reticulum. GO:0035437 maintenance of protein localization in ER maintenance of protein location in ER 2010-04-09T10:39:49Z maintenance of protein location protein localization to endoplasmic reticulum maintenance of protein localization in organelle