The Journal of General Physiology
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The Journal of General Physiology, Vol 14, 583-596, Copyright © 1931 by The Rockefeller University Press

ARTICLE

THE OCCURRENCE OF PORPHYRINS IN CULTURES OF C. DIPHTHERIAE

Calvin B. Coulter 1 and Florence M. Stone 1

1 From the Department of Bacteriology, College of Physicians and Surgeons, Columbia University, New York

A complex porphyrin which has not been hitherto described is found in liquid cultures of C. diphtheriae. The porphyrin is a combination of coproporphyrin with both iron and copper, and shows an oxidation-reduction change. This is the first report, as far as we are able to determine, of a porphyrin compound which contains both iron and copper in its molecule. Its source is in all probability the cytochome of the bacilli.

The content of porphyrin is proportional to the biological titer of the culture filtrate; the suggestion is offered that the toxin itself is derived from cytochrome.

Accepted on March 11, 1931


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