3d image of bilirubin skeletal formula

bilirubin red-orange catabolic heme vertebrates red blood cells red tetrapyrrolic bile pigment porphyrin enzyme biliverdin reductase urine stercobilin urobilin straw-yellow tetrapyrrole pigment phycobilin phytochrome phototherapy delta albumin hepatobiliary disease half-life toxicity bilirubin encephalopathy hyperbilirubinemia seizures enterohepatic circulation tests van den bergh reaction urine metabolite metabolism biosynthesis cycle mechanism pathway path catabolism biosynthetic intermediate precursor synthesis derivative bioprecursor metabolic endogenous 3d