has part occurs in has result has context cell protein quality control for unfolded proteins protein quality control for unfolded via gene expression regulation [ER stress] endoplasmic reticulum stress response imbalance [ER stress] ER stress dependent process endoplasmic reticulum stress [toxic course] protein quality control for unfolded proteins [ER stress (early stage)] protein quality control for unfolded proteins [ER stress] Protein quality control for misfolded or incompletely synthesized proteins is a subtype of keeping quality: A process that maintains the protein quality. This entity is a specific course-dependent process. This process can constitute the course of ER stress.