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Variable expression of proteins associated with DDB1 in Ddb1 cKO mice. (A) SET8, SMAD2, and p-SMAD2 expression in 18 dpc and 0 dpp mouse testes. GAPDH was used as loading control and (B) quantitative results of Western blotting shown in (A). The SET8, SMAD2, and p-SMAD2 protein level were normalized against GAPDH and were arbitrarily set as 1 in the control group. Data were presented as mean ± S.E.M. * p < 0.05, Student’s t-test.
