Urochrome vs. Urobilin

Urochromenoun

(biochemistry) A pigment that causes the yellow color in urine. It is a breakdown product of the blood's haemoglobin and is removed by the kidneys.

Urochromenoun

A yellow urinary pigment, considered by Thudichum as the only pigment present in normal urine. It is regarded by Maly as identical with urobilin.

Urobilinnoun

(biochemistry) A yellow linear tetrapyrrole resulting from the breakdown of heme, produced when urobilinogen is oxidized by intestinal bacteria.

Urobilinnoun

A yellow pigment identical with hydrobilirubin, abundant in the highly colored urine of fever, and also present in normal urine. See Urochrome.

Urobilinnoun

brown bile pigment formed from urobilinogens and found in feces and in small amounts in urine

Urobilin

Urobilin or urochrome is the chemical primarily responsible for the yellow color of urine. It is a linear tetrapyrrole compound that, along with the related colorless compound urobilinogen, are degradation products of the cyclic tetrapyrrole heme.