Abstract:Two blue bile pigments were formed under anaerobic conditions from the tetrapyrrole precursor delta-aminolevulinate by cells and cell extracts of Clostridium tetanomorphum. These compounds were also formed by cell extracts from the octacarboxylic tetrapyrrole, uroporphyrin III. Bactobilin, the first bacterial bile pigment to be discovered, is related to uroporphyrin I. The present results hence increase the number of bile pigments related to bactobilin. Bactobilin and its isomers differ markedly from the eukar… Show more
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