Under conditions of overnutrition, AHR deletion significantly decreased hepatic levels of the primary free bile acid Chenodeoxycholic Acid (CDCA) (Figure 4A) and the primary conjugated bile acids Taurochenodeoxycholic Acid (TCDCA) and Glycochenodeoxycholic Acid (GCDCA) (Figure 4B). The gene discussed is AHR; the disease is overnutrition.