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Expression of HIF-1α in hUCB-MSCs under normoxia or hypoxia. a Expression of HIF-1α was detected by western blot. b The ratio of HIF-1α to β-actin band density values. HIF-1α protein expression was significantly upregulated under hypoxia in hUCB-MSCs (n = 3 per group, *P < 0.05)
