O QUE SIGNIFICA PTERIN EM INGLÊS
Pterin
A pterina é um composto heterocíclico composto por um sistema de anel de pteridina, com um grupo ceto e um grupo amino nas posições 4 e 2, respectivamente. Vários tautómeros de pterina existem e são mostrados abaixo. Derivados de pterina incluem pterinas e folatos. Os Pterins, como um grupo, são compostos que são derivados da estrutura básica de pterina, descrita no início, com grupos funcionais adicionais ligados ao subproduto de pirazina. Pterins foram descobertos pela primeira vez nos pigmentos de asas de borboleta (daí a origem do nome deles, do pteron grego (πτερόν), asa) e desempenham vários papéis na coloração no mundo biológico. Os Pterins também funcionam como cofactores na catálise enzimática. Os folatos são pterins "conjugados" que contêm ácido p-aminobenzóico e L-glutamatos ligados ao grupo metilo na posição 6 do sistema de anel de pteridina. Eles são compostos críticos em um grande número de reações biológicas de transferência de grupo.
definição de pterin no dicionário inglês
A definição de pterina no dicionário é um composto derivado da pteridina, como o ácido fólico.
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10 LIVROS EM INGLÊS RELACIONADOS COM «PTERIN»
Descubra o uso de
pterin na seguinte seleção bibliográfica. Livros relacionados com
pterin e pequenos extratos deles para contextualizar o seu uso na literatura.
1
Laboratory Guide to the Methods in Biochemical Genetics
It has been postulated that this poor solubility in water results from possible
hydrogen bonding of the 2-amino and 4-oxo groups between pterin molecules,
and that this bonding is preferred to hydration. The nature of the substituents and
their ...
Nenad Blau, Marinus Duran, K. Michael Gibson,
2008
2
Metals Ions in Biological System: Volume 39: Molybdenum and ...
Spectroscopic Features Model work has proved that a high degree of electronic
delocalization occurs in these systems, but oxidation state assignments for the
metal and pterin pieces of the product have remained ambiguous and difficult to ...
Astrid Sigel, Helmut Sigel,
2002
the cationic Trp radical in cytochrome c peroxidase (120). By analogy with
peroxidase compound I that utilizes (FeO)3+ and an organic radical (heme or
side chain), NOS may utilize an (FeO)3+/pterin radical intermediate as the active
species ...
4
The Porphyrin Handbook: Biochemistry and binding: activation ...
An illustration depicting SEITU bound at the active site and L-arginine bound at
the pterin site. Dotted lines represent H-bonded interactions. the binding mode of
L-arginine to NOS provides clues regarding the mechanism. Crane and ...
Karl M. Kadish, Kevin M. Smith, Roger Guilard,
2000
5
Handbook of Vitamins, Third Edition
to oxygen, light, and pH extremes, and can break down to p-
aminobenzoylglutamic acid and dihydroxanthopterin, pterin-6-carboxaldehyde,
or pterin-6-carboxylic acid (22). One oxidation product of 5-methyl-H4PteGlu is 5-
methyl-H:PteGlu (23) ...
Robert B. Rucker, John W. Suttie, Donald B. McCormick,
2001
Recently a contribution to the problems of evolution in the genus Drosophila by
study of the pterin pattern in the testis was given by Hubby and Throckmorton (
1960). They showed that representatives from primitive groups (virilis group in
the ...
Ernst W. Caspari, J. M. Thoday,
1961
7
Inborn Metabolic Diseases: Diagnosis and Treatment
Cerebral atrophy and cerebral calcification can occur in DHPR deficiency. In
PCD deficiency symptoms are mild and transient. 17.4.2 Metabolic Derangement
Disorders of pterin synthesis or recycling are associated with decreased activity
of ...
John Fernandes, Jean-Marie Saudubray, Georges van den Berghe,
2006
8
Reactions of Non-heme Iron Active Sites with Dioxygen: ...
coordination position on the Fe[I and the presence of a redox active pterin are
critical for catalytic TH reactivity. In an earlier study on PAH mutants related to
phenylketonuria (PKU), structural differences in the active site were observed that
...
9
Free Energy Calculations in Rational Drug Design
5.2.1 Contacts with the Pterin Ring Moiety The van der Waals and hydrogen
bond contacts between the pterin ring and both the nearby amino acids and
water molecules in the three structures PHT1, PHT2 and PHT3 were evaluated in
order to ...
M. Rami Reddy, Mark D. Erion,
2001
Specificity and the Anti-Pterin-Binding Domain While the 4-oxo anti-pterin PHS-
32 lowers the VmaX value of NOS, the EC50 value for L-arginine is not
significantly changed, and that for reduced nicoti- namide adenine dinucleotide
phosphate ...
Jean-Luc Balligand, Bernd Mayer,
2000
8 NOTÍCIAS NAS QUAIS SE INCLUI O TERMO «PTERIN»
Conheça de que se fala nos meios de comunicação nacionais e internacionais e como se utiliza o termo
pterin no contexto das seguintes notícias.
Chaga-Pilz: Ur-Heilkraft aus frostiger Taiga
Sind es etwa Pterin oder Betulin, die zytostatische Eigenschaften haben? Allein das Zusammenspiel zwischen Polysacchariden, Betulinsäure und dem ... «MMnews, jul 15»
'Kinderen inenten anders arrestatie'
JackHair | 02-03-15 | 16:14 | niet ok! B14 is in verdeling van elementen (matrix) redelijk gelijk aan Pterin-Fosfaat wat een onderdeel is van diverse fungicides. «PowNed, mar 15»
Built-in billboards: Male bluefin killifish signal different things with …
The pigment melanin contributes to the black edges (b) on the anal fin that are a sign of dominance, while pterins account for the red and yellow colors (a) on the ... «Phys.Org, out 14»
Structure Of Folic Acid Bound To Folate Receptor Is Solved
Folate includes a bicyclic pterin head group, aminobenzoate, and glutamate. The glutamate is where cargo has been attached to folate for targeting, and the ... «The Biological SCENE, jul 13»
The New York Times' Chemophobia Is Bad for You
Another common chemical name for methotrexate is amethopterin, which comes from the roots meth, Greek for wine, which I might stretch to spirits, and pterin, ... «Slate Magazine, fev 13»
Nature重要发现：维生素的新功能
Kjer-Nielsen等通过确定MR1结合一种叶酸代谢产物6-formyl pterin (6-FP)的晶体结构鉴别了MR1递呈的抗原。他们的研究源于偶然发现利用包含叶酸的介质可以促进 ... «生物通, nov 12»
Van Ness Ambil Alih Peran Zai Zai
emang baguzzz bgt aktingnya vannes............. tp tl0ng bgt pterin lgi donk film devil beside you pleaseeeeeeeeeeee makasih. 17-Mar-2010 18:10:56 WIB by ... «Indosiar, mar 10»
Pterins, sex and the single butterfly
Not only do these granules contain UV absorbing pterins, but the structural arrangement and density of granules in each wing scale combine to affect just how ... «Chemistry World, nov 06»