title: Biosynthetic and structural studies on pheomelanin.
abstract: 13C-NMR spectroscopy of pheomelanin biopolymers, prepared from isotopically enriched precursors, has been developed as a tool for structure elucidation of melanins. By employing large pulse-widths and short cycle time, only the signals originating from labeled carbons are observed in the high-resolution spectra of these polymers.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D003548:Cysteinyldopa / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D008543:Melanins / Q000096:biosynthesis* / Q000378:metabolism; D011108:Polymers / Q000096:biosynthesis
chemical_list: D000596:Amino Acids; D002247:Carbon Isotopes; D008543:Melanins; D011108:Polymers; C018362:pheomelanin; D003548:Cysteinyldopa