Bilirubin, Serum Level of, Quantitative Trait Locus 1, also known as bilirubin, serum level of, qtl1, is related to cholestasis, benign recurrent intrahepatic, 1 and dubin-johnson syndrome. An important gene associated with Bilirubin, Serum Level of, Quantitative Trait Locus 1 is UGT1A1 (UDP Glucuronosyltransferase Family 1 Member A1), and among its related pathways/superpathways are Metabolism and Metapathway biotransformation Phase I and II. Affiliated tissues include breast, and related phenotype is Increased shRNA abundance (Z-score > 2).