NationMaster - Encyclopedia: Corrin

A corrin is a macrocycle related to the porphyrin ring in hemoglobin, consisting of 4 pyrrole subunits, joined on opposite sides by a C-CH₃ methylene link, on one side by a C-H methylene link, and with the two of the pyrroles joined directly. Compared to a porphyrin, it is missing a bridging methylene group between a pair of pyrroles. Also, the pyrrole rings in corrin have fully saturated edge-carbons, that is, two hydrogens attached compared to only one in porphyrins. This ring is central to the cobalt containing vitamin, vitamin B12, or cobalamin. Corrins have properties related to porphyrins, but: A macrocycle is, as defined by IUPAC, In the chemical literature, organic chemists may consider any molecule containing a ring of seven, fifteen, or any arbitrarily large number of atoms to be macrocyclic. ... Structure of porphine, the simplest porphyrin. ... Structure of hemoglobin. ... Pyrrole, or pyrrol, is a heterocyclic aromatic organic compound, a five-membered ring with the formula C4H5N. Pyrroles are components of larger aromatic rings, including the porphyrins of heme, the chlorins and bacteriochlorins of chlorophyll, and the corrin ring of vitamin B12. ... In chemistry, methylene is a divalent functional group CH2 derived formally from methane. ... Structure of porphine, the simplest porphyrin. ... Cobalamin or vitamin B12 is a chemical compound that is also known as cyanocobalamine. ... Cobalamin or vitamin B12 is a chemical compound that is also known as cyanocobalamine. ...

The related corroles are fully aromatic. A chemically conjugated system, is a system of atoms covalently bonded with alternating single and double bonds (e. ... Corrole is an aromatic ring structure compound similar as porphyrin and vitamin B12. ... In chemistry, an aromatic molecule is one in which electrons are free to cycle around circular arrangements of atoms, which are alternately singly and doubly bonded to one another. ...

Polypyrrole A Polypyrrole (PPy) is a chemical compound formed from a number of connected pyrrole ring structures. ... Bilins are blue or green pigments that consist of a linear arrangement of pyrroles. ... Bilirubin is a yellow breakdown product of normal heme catabolism. ... Biliverdin is a green pigment formed as a byproduct of hemoglobin breakdown. ... Urobilinogen is a colourless product of bilirubin reduction. ... Urobilin is a yellow breakdown product of haem (heme in American English) catabolism. ... Chlorophyll is a green pigment found in most plants, algae, and cyanobacteria. ... Cyanocobalamin is a compound that is metabolized to a vitamin in the B complex commonly known as vitamin B12 (or B12 for short). ... Phycobilins are the chromophores of phycobiliproteins (photosynthetic pigments) found in cyanobacteria and in the chloroplasts of red algae, glaucophytes and some cryptomonads (though not in green algae and higher plants). ... Phycoerythrobilin is a red phycobilin. ... Phycourobilin is a tetrapyrrole orange molecule involved in photosynthesis in cyanobacteria and red algae. ... Structure of porphine, the simplest porphyrin. ... Uroporphyrinogens are tetrapyrroles with four propionic acid groups and four acetic acid groups. ... Uroporphyrinogen I is a tetrapyrrole which accumulates in acute intermittent porphyria. ... Uroporphyrinogens are tetrapyrroles with four propionic acid groups and four acetic acid groups. ... Coproporphyrinogens are tetrapyrroles with four propionic acid groups and an equal number of substituted methyls. ... Coproporphyrinogen I is a tetrapyrrole which accumulates in acute intermittent porphyria. ... Coproporphyrinogens are tetrapyrroles with four propionic acid groups and an equal number of substituted methyls. ... Protoporphyrins are tetrapyrroles containing the following side chains: methyl (4) propionic acid (2) vinyl (2) In the metabolism of porphyrin, protoporphyrin IX is created by the enzyme protoporphyrinogen oxidase, and the enzyme ferrochelatase converts it into heme. ... Protoporphyrins are tetrapyrroles containing the following side chains: methyl (4) propionic acid (2) vinyl (2) In the metabolism of porphyrin, protoporphyrin IX is created by the enzyme protoporphyrinogen oxidase, and the enzyme ferrochelatase converts it into heme. ... Protoporphyrins are tetrapyrroles containing the following side chains: methyl (4) propionic acid (2) vinyl (2) In the metabolism of porphyrin, protoporphyrin IX is created by the enzyme protoporphyrinogen oxidase, and the enzyme ferrochelatase converts it into heme. ... WÃ¶hler observes the synthesis of urea. ... Peptides (from the Greek Ï€ÎµÏ€Ï„Î¿Ï‚, digestible), are the family of short molecules formed from the linking, in a defined order, of various Î±-amino acids. ... This article is about the class of chemicals. ... Look up nucleic acid in Wiktionary, the free dictionary. ... Lactose is a disaccharide found in milk. ... Nucleotide sugars are biochemicals that act as donors of sugar residues in nucleotide sugars metabolism. ... Some common lipids. ... Many terpenes are derived from conifer resins, here a pine. ... The orange ring surrounding Grand Prismatic Spring is due to carotenoid molecules, produced by huge mats of algae and bacteria. ... Polypyrrole A Polypyrrole (PPy) is a chemical compound formed from a number of connected pyrrole ring structures. ... A cofactor is any substance that needs to be present in addition to an enzyme to catalyze a certain reaction. ... This article is about the chemical family of steroids. ... Molecular structure of the flavone backbone (2-phenyl-1,4-benzopyrone) The term flavonoid refers to a class of plant secondary metabolites. ... Chemical structure of ephedrine, a phenethylamine alkaloid An alkaloid is a nitrogen-containing naturally occurring compound, produced by a large variety of organisms, including fungi, plants, animals, and bacteria. ... Polyketides are secondary metabolites from bacteria, fungi, plants, and animals. ... A glycoside is a molecule where a sugar group is bonded through its anomeric carbon to a nonsugar group by either an oxygen or a nitrogen atom. ...