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Isolation of Nuclei from Crayfish Tissues and Demonstration of Nuclear Ecdysteroid Receptors Margarethe Spindler-Barth Diabetes-Forschungsinstitut an der Universität, Aufm Hennekamp 65, D-4000 Düsseldorf 1 Ursula Bassemir EMBL, Meyerhofstr. 1, D-6900 Heidelberg Paul Kuppert and Klaus-Dieter Spindler Institut für Zoologie III, Universität Düsseldorf, Universitätsstr. 1, D-4000 Düsseldorf 1 Z. Naturforsch. 36 c, 326-332 (1981); received October 16/November 17, 1980 Nuclei, Crayfishes, Nuclear Ecdysteroid Receptors Nuclei from hypodermis and midgut gland of the

Hoppe-Seyler's Z. Physiol. Chem. Bd. 363, S. 797^802, August 1982 Ecdysteroid Receptors: A Comparison of Cytoplasmic and Nuclear Receptors from Crayfish Hypodermis Michael LONDERSHAUSEN, Paul KUPPERT and Klaus-Dieter SPINDLER Institut für Zoologie III, Universität Düsseldorf (Received 10 October 1981) Summary: Cytoplasmic and nuclear ecdysteroid receptors from intermolt Orconectes limosus in- tegument have been compared. The specificities as well as the KO values for three [3H]ecdy- steroids are very similar in both preparations. Using a photoaffmity labelling

.-D. ( 1982 ). Characterization of nuclear ecdysteroid receptors from crayfish integument. J. Steroid Biochem. 17 , 205 –210. Kuppert , P., Wilhelm, S., and Spindler, K.-D. ( 1978 ). Demonstration of cytoplasmic receptors for the molting hormones in the crayfishes. J. Comp. Physiol. 128 , 95 –100. Kuppert, P., Daig, K., Londershausen, M., and Spindler, K.-D. (1981). Binding of ecdysteroids in crayfishes. In: Regulation of Insect Development and Behaviour, Sehnal, F. Zabza, A. Menn J.J. and Cymborowski, B. eds. (Wrocław, Poland: Wrocław Technical University Press), pp

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oniolo 305 Radiation Damage to Polypeptides and Proteins in the Solid State: Changes in Amino Acid Com­ position J . S e r e d y n s k i , T . S ö ylem ez , W. B a u m e ist e r , and L . M. H er be r tz 310 Preferential Phosphorylation of High Mobility Group Protein 17 in vitro by a Nuclear Protein Kinase H .-A . Ar f m a n n and H . B aydotjn 319 On a Possible Mechanism of Action of Interferon W. L o hm ann 323 Isolation of Nuclei from Crayfish Tissues and Dem­ onstration of Nuclear Ecdysteroid Receptors M. S p in d l e r -B a r t h , U. B a s s e m ir , P

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Flavanones from a Rare American Fern ........................................................................ 604 Novel Flavonoid Epicuticular Leaf Flavonoids from Eucalyptus Species and from Kalmia latifolia ..................... 913 Nuclear and Cytoplasmic Kinase Preferential Phosphorylation o f High Mobility Group Protein 17 in vitro by a Nuclear Protein Kinase .................................................................... 319 Nuclear Ecdysteroid Receptors Isolation of Nuclei from Crayfish Tissues and Demonstration o f Nuclear Ecdysteroid Re­ ceptors

a nuclear ecdysteroid receptor (AaEcR) together with one or the other of two isoforms of an ortholog of the Drosophila Ultraspiracle protein (AsUsp). The ecdysone receptor complex then binds to the ecdysone response element (EcRE) of putative early ecdysone response genes including AaE75, with their products possibly inducing expression of the yolk pro- tein genes (see 12.4.1.5 for a full summary of ecdysteroid function). 2.2. 1.3 POLE PLASM FORMATION IN OOCYTES Newly deposited eggs of the females in many advanced clades, particularly of those having