Isolation and characterization of a urobilinogenoidic chlorophyll catabolite from Hordeum vulgare L.
A new type of chlorophyll catabolite was isolated from extracts of de-greened primary leaves of barley (Hordeum vulgare cv. Lambic). Its constitution was elucidated by one-dimensional and two-dimensional [(1)H,(13)C]-homo- and heteronuclear NMR spectroscopic techniques and by high resolution mass spectroscopy. The isolated catabolite, a water-soluble, colorless, and nonfluorescent linear tetrapyrrole, resembles urobilinogen in which one of the propionic side chains forms a five membered isocylic ring system, indicating its origin from the chlorophylls.
Losey
F G
FG
Institute of Organic Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland.
Engel
N
N
D002734:Chlorophyll / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D001467:Hordeum / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D014558:Urobilinogen / Q000378:metabolism*
D002734:Chlorophyll; D014558:Urobilinogen