Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Amidation phosphate carriers

The third group is water-immiscible organic species with electron donor or acceptor properties, or solvating carriers. They include carbon-oxygen compounds (amides, ethers, ketones) phosphorus-oxygen compounds (tri- -butylphosphate (TBP), dibutyl-phosphate (DBP) or-phosphonate (DBBP) phosphine oxides (tri- -octylphosphine oxide (TOPO) phosphine sulfides (Cyanex 471) alkyl sulfides (dihexyl, diheptyl sulfides) nitrogen containing compounds (CLX 50), and so on [1-7, 81, 83]. All of them are known as selective extractants, but few of them are tested as carriers in LM processes. [Pg.58]

Amide bonds are found in many proteins. One is the acyl carrier protein of Escherichia coli (see 90), which contains the peptide backbone, and a 4 -phosphopantetheine unit (in violet in the illustration) is attached to a serine residue. Note the amine bonds in the pantothenic acid unit and also the 0-P=0 unit, which is a phosphate ester (an ester of phosphoric acid). An acyl carrier protein is involved in fatty acid synthesis, linking acetyl and malonyl groups from acetyl coenzyme A and malonyl coenzyme A to form P-keto acid acyl carrier protein (abbreviated as ACP). The widely utilized acetyl CoA is an ester (91) attached to coenzyme A. Acetyl CoA is a key intermediate in aerobic intermediary metabolism of carbohydrates, lipids, and some amino acids. [Pg.792]

Dolichol phosphate (Dol-P) is the carrier lipid involved in the assembly of oligosaccharides for transfer to the amide nitrogen of L-asparagine of proteins. The precursor oligosaccharide pyrophosphoryl dolichol is biosynthesized in the endoplasmic reticulum or in the Golgi bodies of eukaryotes from dolichol phosphate and nucleotide diphospho sugars, UDP-GlcNAc, GDP-Man, and UDP-Glc. [Pg.322]

Nicotinic amide, C H4N.CO.NH2, is a constituent of the coenzymes, co-dehydrase I and II, and as such acts as a hydrogen carrier in tissue respiration. The amide is derived from nicotinic acid, or carboxy pyridine, and is combined with ribose phosphate and adenosine in nucleotide structure in the co-dehydrases. Its hydrogen-carrying power is due to the reducibility of the onium nitrogen in the pyridine ring (p. 258). [Pg.374]


See other pages where Amidation phosphate carriers is mentioned: [Pg.287]    [Pg.125]    [Pg.1367]    [Pg.125]    [Pg.73]    [Pg.241]    [Pg.284]    [Pg.740]    [Pg.352]    [Pg.454]    [Pg.433]    [Pg.161]    [Pg.225]    [Pg.282]    [Pg.38]    [Pg.49]    [Pg.481]    [Pg.121]   
See also in sourсe #XX -- [ Pg.29 ]




SEARCH



Amides phosphates

Phosphate carrier

© 2024 chempedia.info