Fig. 2

Effects of different concentrations of NaCl in drinking water on protein expression of proliferating cell nuclear antigen (PCNA), angiotensin II type 1 (AT1) receptor and dopamine receptor D4 (DRD4) in vascular smooth muscle of broilers. a Expression of PCNA protein (n = 6, **P < 0.01 vs. control). b Expression of AT1 receptor protein (n = 6, **P < 0.01 vs. control). c Expression of DRD4 protein (n = 6, **P < 0.01 vs. control)