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Primulin (flavonoid)
Primulin is an anthocyanin. It is the 3-galactoside A galactoside is a glycoside containing galactose. The H of the OH group on carbon-1 of galactose is replaced by an organic moiety. Depending on whether the glycosidic bond lies "above" or "below" the plane of the galactose molecule, galactosides ... of malvidin. It can be found in '' Primula sinensis''. The first crystalline form of this pigment was prepared by Rose Scott-Moncrieff in about 1930. This was the first crystalline anthrocyanine pigment ever identified. This was possible because of her insight into linking genetics with chemistry. Cathie Martin, April 2016, Biochemical classics, Biochemist.org, Retrieved 5 July 2016 References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthocyanin
Anthocyanins (), also called anthocyans, are water-soluble vacuolar pigments that, depending on their pH, may appear red, purple, blue, or black. In 1835, the German pharmacist Ludwig Clamor Marquart gave the name Anthokyan to a chemical compound that gives flowers a blue color for the first time in his treatise "''Die Farben der Blüthen''". Food plants rich in anthocyanins include the blueberry, raspberry, black rice, and black soybean, among many others that are red, blue, purple, or black. Some of the colors of autumn leaves are derived from anthocyanins. Anthocyanins belong to a parent class of molecules called flavonoids synthesized via the phenylpropanoid pathway. They occur in all tissues of higher plants, including leaves, stems, roots, flowers, and fruits. Anthocyanins are derived from anthocyanidins by adding sugars. They are odorless and moderately astringent. Although approved as food and beverage colorant in the European Union, anthocyanins are not approved ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galactoside
A galactoside is a glycoside containing galactose. The H of the OH group on carbon-1 of galactose is replaced by an organic moiety. Depending on whether the glycosidic bond lies "above" or "below" the plane of the galactose molecule, galactosides are classified as α-galactosides or β-galactosides. A β-galactoside is a type of galactoside in which the glycosidic bond lies above the plane of the galactose residue. The most commonly recognized and used β-galactoside in biochemistry is lactose Lactose is a disaccharide sugar synthesized by galactose and glucose subunits and has the molecular formula C12H22O11. Lactose makes up around 2–8% of milk (by mass). The name comes from ' (gen. '), the Latin word for milk, plus the suffix '' - .... However, other chemicals, such as ONPG, are known, but these are typically synthesized for biochemical assays. Galactosides play significant roles in metabolic processes of many organisms and are hydrolyzed by a class of enzymes called ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malvidin
Malvidin is an O-methylated anthocyanidin, the 3',5'-methoxy derivative of delphinidin. As a primary plant pigment, its glycosides are highly abundant in nature. Natural occurrences Malvidin is responsible for the blue color found in petals of the ''Primula'' plants of the ''polyanthus'' group. Blue flowers of the blue pimpernel ('' Anagallis monelli'') have also a higher concentration of malvidin. It is responsible primarily for the color of red wine, ''Vitis vinifera'' being one of its sources. It is also present in other berries, such as blueberries (''Vaccinium corymbosum'') or the saskatoon berries (''Amelanchier alnifolia''). Chemistry Slightly acidic and neutral solutions of malvidin are characteristically of a red color, while basic solutions of malvidin yield a blue color. The breakdown of malvidin releases syringic acid. Use as a marker in archaeology The breakdown of malvidin releases syringic acid as revealed in the examination of jars containing shedeh, a dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primula Sinensis
''Primula sinensis'', () or the Chinese primrose, is a plant species in the genus ''Primula''. Primulin (anthocyanin), Primulin is an anthocyanin found in ''P. sinensis.'' References Primula, sinensis Plants described in 1821 {{Primulaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rose Scott-Moncrieff
Rose Scott-Moncrieff (1903-1991), was an English biochemist, credited with founding the science of biochemical genetics. Life She was born Rose Scott-Moncrieff in 1903. She studied an undergraduate degree at Imperial College London and received a PhD from Cambridge in 1930. However, because she was female she was given only a certificate and she was not allowed to join the university. She worked at the John Innes Horticultural Institution. In the 1930s she worked alongside some of the leading figures in chemistry and genetics. Her recollections of her career were recounted in her book 'The Classical Period in Chemical Genetics. Recollections of Muriel Wheldale Onslow, Sir Robert Robinson and J. B. S. Haldane'. Rose Scott-Moncrieff joined the Biochemistry department at the University of Cambridge in 1925 and studied under Muriel Onslow (née Wheldale). She continued Wheldale's research into the genetic control of pigmentation in '' Antirrhinum majus.'' In 1929 Scott-Moncrieff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
