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Expression of ADMA metabolism-related protein in the placental and umbilical cord tissues. Protein bands of PRMT1, DDAH1 and DDAH2 in the placental (a) and umbilical cord (b) tissues were examined by Western blot analysis (n = 5 per group). β-Actin and GAPDH were used as internal references. Values are expressed as mean ± SD. *P < 0.05, **P < 0.01 compared with “control”
