Talk:Porphyrin
From Wikipedia, the free encyclopedia
 |
This article is within the scope of WikiProject Chemistry, which collaborates on Chemistry and related subjects on Wikipedia. To participate, help improve this article or visit the project page for details on the project. | ||
|
Article Grading: The article has not been rated for quality and/or importance yet. Please rate the article and then leave comments here to explain the ratings and/or to identify the strengths and weaknesses of the article.. |
|||
 |
This article is within the scope of the Molecular and Cellular Biology WikiProject. To participate, visit the WikiProject for more information. The WikiProject's current monthly collaboration is focused on improving Restriction enzyme. |
||
| B | This article has been rated as B-Class on the assessment scale. |
||
| High | This article is on a subject of High-importance within molecular and cellular biology. | ||
|
Article Grading: The article has been rated for quality and/or importance but has no comments yet. If appropriate, please review the article and then leave comments here to identify the strengths and weaknesses of the article and what work it will need. |
|||
Not sure where this should be on the page:
Porphyrin is excreted by rats when they are fighting infections in the form of red-brown fluid from the eyes, nose or ears. This is often mistaken for a nosebleed. Discworldian 17:07, 30 November 2006 (UTC)
[edit] Geological context
It seems that porphyrin residues have been detected in shales dating back to the Cambrian era, but most of the pubs I could dredge with Google are subducted into subscription-only dark zones.
- Messel oil shale
- Treibs hypothesis (aka Treibs scheme)
From The Treibs hypothesis: An evaluation based on structural studies -- Keely 1999
The Treibs hypothesis linking sedimentary 13,15-ethanoporphyrins to an origin from chlorophylls requires the natural occurrence of a suite of intermediates on the proposed degradative pathway.^The hypothesis was suggested over 50 years ago, yet despite the now extensive literature on the structural characterization of sedimentary porphyrins, few of the putative intermediates have been isolated and identified.
From Porphyrins from Messel oil shale (Eocene, Germany): Structure elucidation, geochemical and biological significance, and distribution as a function of depth -- Ocampo 1992 (emp. mine)
The extraction and isolation procedures of twenty nickel porphyrins (seven alkylporphyrins, thirteen carboxylic acids) from lacustrine Messel shale ... are described. Ten porphyrins could be specifically correlated with biological precursors: algal chlorophyll c (4), bacteriochlorophylls d (3) and heme (3), while the remaining ones may arise from several chlorophylls. The structures of these fossil pigments mostly confirm the classical "Treibs scheme," including the origin of some porphyrins from nonchlorophyll sources.
From a Google link synopsis for a broken link:
Features of porphyrin compounds in Cambrian oil shales from Yakutiya, Siberia ... Vanadyl porphyrins were isolated from Yakutiya oil shale bitumens and also ...
MaxEnt 18:08, 29 June 2007 (UTC)
[edit] Conjugated
The lead sentence states that macrocycles are "therefore highly conjugated" and I don't even know which discipline resolves this term. Electrochemistry? Linguistics? Sexual reproduction? MaxEnt 17:29, 29 June 2007 (UTC)
- I wikilinked it to the relevant page. DMacks 18:12, 29 June 2007
The table does not mention of X linked sideroblastic anemia. ALthough it is not a porphyria it is caused by mutations in the ALA synthase gene found on chromosome X.
