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Protoporphyrins

"Protoporphyrins" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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Porphyrins with four methyl, two vinyl, and two propionic acid side chains attached to the pyrrole rings. Protoporphyrin IX occurs in hemoglobin, myoglobin, and most of the cytochromes.


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This graph shows the total number of publications written about "Protoporphyrins" by people in this website by year, and whether "Protoporphyrins" was a major or minor topic of these publications.
Bar chart showing 6 publications over 4 distinct years, with a maximum of 2 publications in 1989 and 1995
To see the data from this visualization as text, click here.
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