Bile Acid Conjugation Defect 1, also known as bacd1, is related to hypercholanemia, familial 1. An important gene associated with Bile Acid Conjugation Defect 1 is BAAT (Bile Acid-CoA:Amino Acid N-Acyltransferase). Affiliated tissues include liver and bone, and related phenotypes are jaundice and elevated circulating alanine aminotransferase concentration