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. 2021 Jun 4;13(11):2813. doi: 10.3390/cancers13112813

Figure 1.

Figure 1

Canonical regulatory mechanisms behind the activation of HIF-1 and HIF-1 inhibitors targeting them. HIF-1 activity is mainly regulated at the HIF-1α protein stability level through PHD-dependent hydroxylation and VHL-mediated ubiquitination. See the main text for details.