text: The delta form of this substance is bound to albumin. Diazosulfanilic acid reacts with this substance in thevan den Bergh reaction.
full_question: The delta form of this substance is bound to albumin. Diazosulfanilic acid reacts with this substance in thevan den Bergh reaction. Excess levels of a form of it may cross the blood-brain barrier and cause kernicterus.The star-28 allele of UGT1A1 can cause high levels of this compound to circulate in the blood in Gilbert'ssyndrome. The Z,Z form of this compound is converted into the more soluble E,Z-isomer during phototherapyon newborns. This open-chain tetrapyrrole is solubilized by glucuronyltransferase, and increased amounts ofit are released in hemolytic anemia. It is metabolized from a "verdin" precursor and broken down to thecompounds that give feces and urine their colors. For 10 points, name this product of heme catabolism that athigh levels causes jaundice. 
first_sentence: The delta form of this substance is bound to albumin. Diazosulfanilic acid reacts with this substance in thevan den Bergh reaction.
raw_answer: bilirubin [prompt on hematoidin; prompt on bile pigments]