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. 1981 Mar;78(3):1700–1702. doi: 10.1073/pnas.78.3.1700

Accumulation of protoporphyrin IX and Zn protoporphyrin IX in Cyanidium caldarium

K Csatorday 1,*, R MacColl 1, D S Berns 1,†
PMCID: PMC319200  PMID: 16592992

Abstract

In vivo fluorescence studies of Cyanidium caldarium mutants grown in the dark in dextrose-containing media have shown that these organisms accumulate protoporphyrin IX. In the dark the accumulated protoporphyrin IX is gradually turned into a metalloporphyrin, Zn protoporphyrin. In the light, in the chlorophyll-lacking mutant GGB, both compounds are degraded and phycobiliproteins are formed. These results implicate protoporphyrin IX in situ as the general precursor to tetrapyrrole pigments and Zn protoporphyrin IX as a possible intermediate or regulator in the biosynthesis of phycobilins.

Keywords: tetrapyrrole, biosynthesis, fluorescence

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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