porphyrin

porphyrin
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.).
See Also: porphyria, porphyric

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  • porphyrin — [pôr′fə rin] n. [< Gr porphyra, purple + IN1] any of a group of pyrrole derivatives, found in cytoplasm, that combine with iron and magnesium to form heme and chlorophyll, respectively …   English World dictionary

  • Porphyrin — Structure of porphine, the simplest porphyrin Heme group of hemoglobin. An …   Wikipedia

  • Porphyrin — Strukturformel des Porphyrin Gerüst mit Nummerierung. Strukturformel von Protoporphyrin IX. Porphyrine (nach griechisch πορφυρά, porphyrá, dem …   Deutsch Wikipedia

  • porphyrin — SYN: porphin. * * * por·phy·rin pȯr fə rən n any of various compounds with a structure that consists essentially of four pyrrole rings joined by four =CH groups esp one (as chlorophyll or hemoglobin) containing a central metal atom and usu.… …   Medical dictionary

  • porphyrin — porfirinas statusas T sritis chemija apibrėžtis Porfinui artimas junginys. atitikmenys: angl. porphyrin rus. порфирин …   Chemijos terminų aiškinamasis žodynas

  • Porphyrin à bec jaune — Porphyrospiza caerulescens Porphyrin …   Wikipédia en Français

  • porphyrin à bec jaune — geltonsnapis startinis kardinolas statusas T sritis zoologija | vardynas atitikmenys: lot. Passerina caerulescens; Porphyrospiza caerulescens angl. yellow billed blue finch rus. голубой овсянковый кардинал, m pranc. porphyrin à bec jaune, m… …   Paukščių pavadinimų žodynas

  • porphyrin à bec jaune — geltonsnapiai startiniai kardinolai statusas T sritis zoologija | vardynas atitikmenys: lot. Porphyrospiza angl. yellow billed blue finch rus. голубой овсянковый кардинал, m pranc. porphyrin à bec jaune, m ryšiai: platesnis terminas –… …   Paukščių pavadinimų žodynas

  • porphyrin — noun Etymology: International Scientific Vocabulary, from Greek porphyra purple Date: 1910 any of various compounds with a macrocyclic structure that consists essentially of four pyrrole rings joined by four =CH– groups; especially one (as… …   New Collegiate Dictionary

  • porphyrin — /pawr feuh rin/, n. Biochem. a dark red, photosensitive pigment consisting of four pyrrole rings linked by single carbon atoms: a component of chlorophyll, heme, and vitamin B12. [1905 10; < Gk porphýr(a) PURPLE + IN2] * * * Any of a class of… …   Universalium

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