Topic
Protoporphyrin IX
About: Protoporphyrin IX is a research topic. Over the lifetime, 2250 publications have been published within this topic receiving 65544 citations. The topic is also known as: PpIX.
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TL;DR: In this paper, the relationship between phytotoxic activity and the induced accumulation of porphyrin intermediates was investigated using an aquatic higher plant duckweed ( Lemna paucicostata Hegelm), which was highly susceptible to exogenously applied δ-aminolevulinic acid.
22 citations
TL;DR: The results strongly suggest that ferrochelatase in kidney, liver and erythroid cells can be of one type.
22 citations
TL;DR: It can be shown that the peroxidation-inhibiting effect of diuron is not due to depletion of oxygen but to impaired photosynthesis, and although autotrophic and heterotrophic cells attain different levels of protoporphyrin IX, induced by either oxyfluorfen or chlorophthalim, the amount of peroxidative ethane formation is found to be similar.
22 citations
TL;DR: The major constituents of bird eggshells (mineral, matrix, pigment) can be analysed without sample destruction, which is ideal for ancient and other precious eggshell specimens.
Abstract: Avian eggshells are variable in appearance, including coloration. Here, we demonstrate that Raman spectroscopy can provide accurate diagnostic information about major eggshell constituents, including the pigments biliverdin and protoporphyrin IX. Eggshells pigmented with biliverdin showed a series of pigment-diagnostic Raman peaks under 785 nm excitation. Eggshells pigmented with protoporphyrin IX showed strong emission under 1064 nm and 785 nm excitation, whereas resonance Raman spectra (351 nm excitation) showed a set of protoporphyrin IX informative peaks characteristic of protoporphyrin IX. As representative examples, we identified biliverdin in the olive green eggshells of elegant crested tinamous (Eudromia elegans) and in the blue eggshells of extinct upland moa (Megalapteryx didinus). This study encouragesthewider use of Raman spectroscopy in pigment and coloration research and highlights the value of this technique for non-destructive analyses of museum eggshell specimens.
22 citations
TL;DR: The synthesis of a haemoglobin wrapped covalently by recombinant human serum albumin mutants containing Mn(III) protoporphyrin IX (MnPP)3 cluster is described, highlighting the formation of its O2-complex stable even in H2O2 solution.
22 citations