FIGURE 2.

Percent of genes assigned to metabolic pathways related to amino acid metabolism listed in the KEGG database in the crop content of broiler chickens fed with differently acidified diets with low and high calcium concentrations without (–) and with (+) supplementation of 1500 FTU phytase/kg, values are least square means, n = 6 pens/treatment with 15 birds/pen, only significantly influenced pathways are presented (P ≤ 0.05), columns within a statistical comparison not sharing the same letter are significantly different (P ≤ 0.05), details of the statistical evaluations are shown in Supplementary Table 4. See Table 2 for abbreviations.