Definitions for porphyrin
ˈpɔr fə rɪnpor·phyrin

Princeton's WordNetRate this definition:0.0 / 0 votes

1. porphyrinnoun

   any of various pigments distributed widely in living tissues

WiktionaryRate this definition:0.0 / 0 votes

1. porphyrinnoun

   Any of a class of heterocyclic compounds containing four pyrrole rings arranged in a square; they are important in biochemistry in a form with a metal atom in the central cavity (hemoglobin with iron, chlorophyll with magnesium, etc.).

2. Etymology: * From the Greek πορφύρα (porphyra)

WikipediaRate this definition:0.0 / 0 votes

1. Porphyrin

   Porphyrins ( POR-fər-in) are a group of heterocyclic macrocycle organic compounds, composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges (=CH−). The parent of porphyrin is porphine, a rare chemical compound of exclusively theoretical interest. Substituted porphines are called porphyrins. With a total of 26 π-electrons, of which 18 π-electrons form a planar, continuous cycle, the porphyrin ring structure is often described as aromatic. One result of the large conjugated system is that porphyrins typically absorb strongly in the visible region of the electromagnetic spectrum, i.e. they are deeply colored. The name "porphyrin" derives from the Greek word πορφύρα (porphyra), meaning purple.

ChatGPTRate this definition:0.0 / 0 votes

1. porphyrin

   Porphyrin is a group of organic compounds, many of which are biologically significant due to their participation in crucial life processes. They are characterized by a large ring-like structure composed of four smaller pyrrole rings linked by methine bridges. Important porphyrins include heme, chlorophyll, and vitamin B12, which play key roles in oxygen transportation, photosynthesis, and cell metabolism respectively.

WikidataRate this definition:3.0 / 1 vote

1. Porphyrin

   Porphyrins are a group of organic compounds, many naturally occurring. One of the best-known porphyrins is heme, the pigment in red blood cells; heme is a cofactor of the protein hemoglobin. Porphyrins are heterocyclic macrocycles composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges. Porphyrins are aromatic. That is, they obey Hückel's rule for aromaticity, possessing 4n+2 π electrons delocalized over the macrocycle. Thus porphyrin macrocycles are highly conjugated systems. As a consequence, they typically have very intense absorption bands in the visible region and may be deeply colored; the name porphyrin comes from a Greek word for purple. The macrocycle has 26 pi electrons in total. The parent porphyrin is porphine, and substituted porphines are called porphyrins. The specific porphyrin in heme B is called protoporphyrin IX and has 4 methyl, two vinyl, and two propionic acid substituents at the indicated positions.

Matched Categories

1. • Pigment

How to pronounce porphyrin?

1. Alex

   US English

   David

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   Mark

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   Daniel

   British

   Libby

   British

   Mia

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   Karen

   Australian

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   Neerja

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How to say porphyrin in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of porphyrin in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of porphyrin in Pythagorean Numerology is: 4

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=porphyrin
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Porphyrin
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Porphyrin
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=porphyrin