出典:Wiktionary
出典:『Wiktionary』 (2026/01/03 14:57 UTC 版)
urobilin (countable and uncountable, plural urobilins)
出典:Wikipedia
出典:『Wikipedia』 (2011/02/24 06:00 UTC 版)
Urobilin (urochrome was the original name given to the pigment thought to give urine its color. It is now known that several related pigments are responsible, so the original name has been dropped.) is a yellow linear tetrapyrrole, resulting from the breakdown of heme, a cyclic tetrapyrrole. The normal yellow color of urine is attributable to urobilin.