title: The stigma of Euglena gracilis strain Z: an investigation into the possible occurrence of carotenoproteins and nucleic acids.
abstract: Isolated stigmata of light grown cells of Euglena gracilis strain Z were solubilized by a zwitterionic surfactant. The resulting extract was fractionated by gel filtration, and two fractions were obtained. These were then examined for the presence of carotenoproteins and nucleic acids using the techniques of UV/visible spectroscopy, thin layer chromatography and isoelectrofocusing. DNA but not RNA was shown to be present in the high molecular weight fraction, while carotenoid pigments were present in the low molecular weight fraction but they were shown not to be in stoichiometric combination with protein.
mesh_terms: D002338:Carotenoids / Q000032:analysis*; D004247:DNA / Q000032:analysis*; D005056:Euglena gracilis / Q000032:analysis / Q000648:ultrastructure*; D009940:Organoids / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis*; D012313:RNA / Q000032:analysis
chemical_list: D010940:Plant Proteins; D002338:Carotenoids; D012313:RNA; D004247:DNA