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. 2022 Oct 3;13(10):846. doi: 10.1038/s41419-022-05250-5

Fig. 2. The UPR pathways.

Fig. 2

A Activation of the UPR pathways. Three ER stress transducers have been identified: IRE1, ATF6 and PERK. These integral membrane proteins sense the protein folding status in the ER lumen and communicate this information to cytosolic target proteins that translocate to the nucleus to modulate gene expression. B Examples of physiological and pathological processes in which the UPR is implicated. C Key steps of viral infection regulated by the UPR.