Zur Kenntnis der Saproporphyrine. (Fortsetzung der Untersuchung. Kopratoporphyrin als häufiges Produkt der Fäulnis von Fleisch und blutreichen Organen.

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Abstract
According to H. Fischer, putrid meat and animal organs contain coproporphyrin, a substance derived from a hypothetical hemoglobin B. Experiments are here described in which horse meat and beef hearts were allowed to putrefy spontaneously for weeks and months. Considerable quantities of saproporphyrins developed, but in only 1 case was there the slightest suggestion of a positive coproporphyrin test. Copratoporphyrin was uniformly present in considerable amount; Fischer probably mistook this for coproporphyrin. Neither copratoporphyrin nor saproporphyrin D was known at the time of his work. The hypothetical hemoglobin B lacks experimental support.

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