Conformation and toxicity of amanitins

Zusammenfassung Die Cottoneffekte der Amanitine konnten dem Indolteil bzw. den Amidgruppen des Molekühls zugeordnet werden. Das untoxische Amanullin besitzt die gleiche Konformation wie die toxischen Peptide, das untoxische Aldoamanitin dagegen eine andere. Die absolute Konfiguration der Sulfoxidgruppe der Amatoxine ist identisch mit der des toxischen Phalloidinsulfoxids.

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Part 43 of the series: Components of the green deathcap toadstoolAmanita phalloides. Part 42:F. Fahrenholz, H. Faulstich andTh. Wieland, Liebigs Annln Chem.743, 83 (1971).

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Acknowledgment. The authors wish to express their gratitude toDr. A. Buku for preparation of methyl--aldoamanitin.     

On the question of American eels,Anguilla rostrata versus European eels,Anguilla anguilla

Zusammenfassung Der amerikanische AalAnguilla rostrata (2n=38; 20M+18A) gehört einer anderen Spezies an als der europäischeAnguilla anguilla (2n=38; 32M+6A).

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This work was supported in part by a grant No. CA 05138 from the National Cancer Institute, U.S. Public Health Service.     

Acceleration of red cell glycolysis by citrate due to intracellular pH enhancement

Zusammenfassung Nachweis, dass in Konsequenz der intra- und extrazellulären pH-Differenz, das Citrat die Erythrocyten Glycolyse beschleunigt.     

Synthesis of rhodotorucine A,the inducing factor of mating tube formation ofRhodosporidium toruloides

Summary The inducing factor of mating tube formation ofRhodosporidium turuloides, named rhodotorucine A (H-Tyr-Pro-Glu-Ile-Ser-Trp-Thr-Arg-Asn-Gly-Cys(S-farnesyl)-OH), has been synthesized to confirm the structure proposed for the natural lipopeptide. The synthetic S-farnesyl undecapeptide has identical Rf values on TLC using several different solvents, and also the same biological activity as the natural hormone.Acknowledgments. We wish to express our thanks to Drs E. Ohmura, M. Nishikawa and M. Yoneda of Takeda Chemical Industries and Dr I. Banno of Institute for Fermentation, Osaka, for their encouragement throughout this work.     

Lymphatic metastasis of tumour; persistent transport of cells

Summary A model of lymphatic metastasis established by injecting Walker rat carcinoma cells into the rat footpad was used to study the output of tumour cells from the footpad. The lymphatic efferent from the footpad was cannulated in a group of rats with advanced neoplasm; it was shown that the output of tumou cells was continuou over periods up to 90 min and ranged from 10²–10⁵ cells/min.Acknowledgment. This work was supported by a grant from the National Cancer Institute of Canada to C.R.F. and I.C. We are grateful to Mrs W. Kao and Mr I. Etches for meticulous technical help and to the Photographic Section, Department of Pathology for illustrations. Dr V.S. Gupta of Veterinary Physiology, University of Saskatchewan supplied the tumour for transplantation.