Bilirubin (Direct Conjugated) >70%

Conjugated bilirubin antigen, supplied as a lyophilized powder in a 25mg vial format by Antibodies.com. Direct (conjugated) bilirubin refers to the water-soluble form produced when the liver enzyme UGT1A1 attaches glucuronic acid to bilirubin, increasing its solubility for biliary excretion. Researchers use high-purity (>70%) conjugated bilirubin antigen for antibody production, immunoassay calibration, and as a reference standard in clinical chemistry studies investigating hepatocellular function, hemolytic conditions, and neonatal jaundice.

The lyophilized format offers extended shelf life when stored refrigerated and protected from light, with reconstitution flexibility for custom working concentrations. Bilirubin is light-sensitive and oxidizes readily, so amber containers and minimal light exposure during handling preserve antigen integrity.

Laboratory applications include:

• Immunogen for generating anti-bilirubin monoclonal or polyclonal antibodies
• Coating antigen in competitive immunoassays measuring direct bilirubin levels
• Standard or control material in HPLC and spectrophotometric methods
• Substrate or spike-in for diagnostic kit development and validation

This research-grade antigen from Antibodies.com supports in vitro laboratory workflows and is intended for research use only. Each lot is quality-controlled to confirm purity above the stated threshold, providing consistent bilirubin conjugate performance for sensitive analytical protocols.