Fig. 3From: Arginine and its metabolites stimulate proliferation, differentiation, and physiological function of porcine trophoblast cells through β-catenin and mTOR pathwaysEffects of the addition of sodium nitroprusside and putrescine on mRNA expression of PCNA in porcine trophoblast cells. a-c Value columns with different letters are significantly different (P < 0.05).Back to article page