Fig. 3From: Ascorbic acid synthesis and transportation capacity in old laying hens and the effects of dietary supplementation with ascorbic acidTransporter gene expression levels of the old and young hens in Exp. 1. a-d Sodium dependent vitamin C transporter (SVCT) 1 and SVCT2 gene expression levels in the ileum, kidney, spleen and liver of old hens (Old) and young hens (Young). e The SVCT1 gene expression levels in the duodenum, jejunum, and ileum. *means P < 0.05; **means P < 0.01Back to article page