Filtern
Volltext vorhanden
- ja (1) (entfernen)
Erscheinungsjahr
- 1980 (1) (entfernen)
Dokumenttyp
- Postprint (1)
Sprache
- Englisch (1)
Gehört zur Bibliographie
- nein (1)
Schlagworte
- N-acetyldopamine (1)
- sclerotization (1)
- tanning agents (1)
- tyrosinase; o-quinones (1)
Institut
- Institut für Chemie (1) (entfernen)
[1-14C]-N-Acetyldopamine (NADA) was oxidized in the presence of methyl [3-3H]-β-alanate with mushroom tyrosinase. The complex mixture of reaction products was partly resolved by chromatographic procedures and analyzed by spectroscopic methods. Methyl-β-alanate is incorporated to only a small extent into oxidation products of NADA which inter alia are presumed to be oligomeric hydroxyquinones. After oxidation of [1-14C, 2-3H]-NADA with preparations from tanning Manduca sexta pupal cuticle, N-acetylnoradrenalin was identified as one of the products. Binding of radioactivity to melanin-like material was also observed. These results suggest that oxidation products different from those formulated usually for the crosslinkages between protein amino groups and N-acetyldopaquinone are deposited in darkly brown coloured insect cuticles during sclerotization.