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. 2019 Mar 12;6:11. doi: 10.3389/fmolb.2019.00011

Figure 1.

Figure 1

Overview of UPR signaling pathway. The UPR instigates a transcriptional and translational response to ER stress. The three UPR activator proteins, IRE1, PERK, and ATF6 give rise to three separate branches of the response, all of which aim to alleviate the burden of misfolded protein and to ensure successful ER protein homeostasis.