title: Occurrence and characterization of a labile xanthommatin precursor in some invertebrates.
mesh_terms: D000596:Amino Acids / Q000096:biosynthesis; D001516:Bees; D055598:Chemical Phenomena; D002621:Chemistry; D004175:Diptera; D006257:Head / Q000032:analysis / Q000378:metabolism; D006801:Humans; D007313:Insecta / Q000378:metabolism*; D008974:Mollusca / Q000378:metabolism*; D008121:Nephropidae / Q000378:metabolism*; D049831:Octopodiformes; D010078:Oxazines / Q000096:biosynthesis*; D010786:Photoreceptor Cells / Q000032:analysis* / Q000378:metabolism; D010848:Picolinic Acids / Q000096:biosynthesis; D010860:Pigments, Biological / Q000096:biosynthesis*; D011498:Protein Precursors / Q000302:isolation & purification* / Q000378:metabolism; D012867:Skin / Q000032:analysis* / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000596:Amino Acids; D010078:Oxazines; D010848:Picolinic Acids; D010860:Pigments, Biological; D011498:Protein Precursors