Fig. 1From: The differences of gonadal hormones and uterine transcriptome during shell calcification of hens laying hard or weak-shelled eggsRelative expression levels of calcium ion transport-related genes in the duodenum. a PMCA1b; (b) CaBP-D28k; (c) NCX1. The initiation period of LS is set at 1.0. Values are means ± SEM. Means with * are obviously different from the LS in the same calcification period (P < 0.05)Back to article page