Tags: Chemical Compound, Chemical Substance.

Phycourobilin is a tetrapyrrole orange molecule involved in photosynthesis in cyanobacteria and red algae. This chromophore is bound to the phycobiliprotein phycoerythrin the distal component of the light-harvesting system of cyanobacteria and red algae (phycobilisome).When bound to phycoerythrin phycourobilin shows an absorption maximum around 495 nm. This chromophore is always a donor chromophore of phycoerythrins since their acceptor chromophore is always phycoerythrobilin.

Phycourobilin.png
IUPAC name
3-[2-[(Z)-[3-(2-carboxyethyl)-5-[ [(2R)-4-ethyl-3-methyl-5-oxo-12-dihydropyrrol-2-yl]methyl]-4-methyl-2-pyrrolylidene]methyl]-5-[ [(2S)-3-ethyl-4-methyl-5-oxo-12-dihydropyrrol-2-yl]methyl]-4-methyl-1H-pyrrol-3-yl]propanoic acid

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