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Coproporphyrin III and its Zn and Ni chelates from cultures of Streptomyces sp. A-305

Maria L. Bruzzone; Carlo G. Casinovi; Corrado Galeffi; Antonio Tonolo; Antonio Trilli — 1974

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

Da culture di Streptomyces sp. A-305 contenenti ioni Zn e Ni sono stati isolati la coproporfirina III ed i due chelati Zn e Ni coproporfirina III. È discussa l'azione inibitrice dello ione Ni nel metabolismo porfirinico. La conformazione dei due nuovi chelati tetradentati, entrambi diamagnetici, è esaminata in base agli spettri RMN, alla configurazione elettronica degli ioni Zn e Ni ed alla struttura delle porfirine. I tetrametilesteri dei due chelati sono preparati anche per introduzione degli...

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