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'Biosynthesis' in keywords Facet   Publication Year 1984  [X]
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1984[X]
1Author    NicolaasJ. De Mola, Johannes Reischb, G. Erardus, M. J. Beijersbergen, H. EnegouwRequires cookie*
 Title    On the Involvement of Singlet Oxygen in the Biosynthesis of Oxygenation Products of the Furocoumarin Imperatorine  
 Abstract    The role of singlet oxygen (' 0 2) in the photo-oxidation of the furocoumarin im peratorine was investigated in vitro. Irradiation with visible light and sensitization with methylene blue yielded the im peratorine oxidation product isogosferol and the corresponding ketone as main products. The involvement of ' 0 2 was dem onstrated by studying the rate of oxidation under conditions that affect the lifetime of ' 0 2. Com pared to a range of other furocoum arins, im peratorine appeared to be m oderately active as a '0 2 generator. The extent of ' 0 2 production correlated with the skin sensitizing activity. U pon irradiation of im peratorine itself with U VA light (360 nm) no isogos­ ferol formation is observed, probably as a consequence of its photochem ical instability. Irradia­ tion with visible light (A > 4 0 0 nm) of a chlorophyll chrom ophore containing sensitizer in the presence of im peratorine, yielded isogosferol and the corresponding ketone product. This dem on­ strates that in the form ation of ' 0 2 oxidation products of im peratorine in plants naturally occuring sensitizers e.g. chlorophyll and visible light are involved, rath er than ' 0 2 produced by im peratori-ne or other furocoumarins and U VA light. The protective effect on the chlorophyll sensitized im peratorine oxidation by the ' 0 2-and chlorophyll triplet quencher /3-carotene was dem onstrated in a lipophilic solvent. 
  Reference    Z. Naturforsch. 39b, 1433 (1984); received D ecem ber 12 1983 
  Published    1984 
  Keywords    Singlet Oxygen, Biosynthesis, Im peratorine, Isogosferol, Photo-oxygenation 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1433.pdf 
 Identifier    ZNB-1984-39b-1433 
 Volume    39 
2Author    H. Artm, Ut KayserRequires cookie*
 Title    De novo Synthesis and Levels of Cytochrome c and a Biliprotein during Pupal-Adult Development of a Butterfly, Pieris brassicae  
 Abstract    Using a sensitive pH-difference spectroscopic method in combination with a three-column procedure of ion-exchange chromatography (overall yield 94%) the levels o f cytochrome c in the large white butterfly, Pieris brassicae, were determined from the last larval instar to the adult 
  Reference    Z. Naturforsch. 39c, 938—947 (1984); received May 21/July 25 1984 
  Published    1984 
  Keywords    Cytochrome c, Biliprotein, Biosynthesis, Development, Insects 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0938.pdf 
 Identifier    ZNC-1984-39c-0938 
 Volume    39 
3Author    Hartmut Kayser, Ute Krull-SavageRequires cookie*
 Title    Development-Specific Incorporation of [14C]5-Aminolevulinate and pHJLeucine into Cytochrome c and Biliprotein in the Butterfly, Pieris brassicae. Correlation with the Ecdysteroid Titer in the Pupa  
 Abstract    Incorporation of [14C]5-aminolevulinate and [3H]leucine into cytochrome c, biliprotein and total soluble protein was followed from the last larval instar to the adult stage in Pieris brassicae. 
  Reference    Z. Naturforsch. 39c, 948—957 (1984); received May 21 /July 25 1984 
  Published    1984 
  Keywords    Cytochrome c, Biliprotein, Biosynthesis, Ecdysteroids, Insect Development 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0948.pdf 
 Identifier    ZNC-1984-39c-0948 
 Volume    39