title: Spectroscopic studies of brunescent cataractous lenses.
abstract: The absorption spectra of brunescent cataractous lenses and their homogenates were analyzed under various conditions by using a double wavelength spectrophotometer. The absorption spectra of the samples were in good agreement with those of synthetic xanthommatin derived from 3-hydroxykynurenine. The results provided evidence that brown pigment in the brunescent cataractous lenses is mainly composed of xanthommatin.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D002386:Cataract / Q000378:metabolism*; D006801:Humans; D010078:Oxazines / Q000032:analysis*; D010860:Pigments, Biological; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry / Q000379:methods; D014966:Xanthenes
chemical_list: D000596:Amino Acids; D010078:Oxazines; D010860:Pigments, Biological; D012168:Retinal Pigments; D014966:Xanthenes; C002866:xanthommatin