The chemotaxis of Vibrio cholerae, the causative agent of cholera, has been implicated in pathogenicity. The bacterium has more than 40 genes for methyl-accepting chemotaxis protein (MCP)-like proteins (MLPs). In this study, we found that glycine and at least 18 L-amino acids, including serine, arginine, asparagine, and proline, serve as attractants to the classical biotype strain O395N1. Based...

Titan organic haze analogues, or "tholins," produce biomolecules when hydrolyzed at low temperature over long timescales. By using a combination of high-resolution mass spectroscopy and tandem mass spectrometry fragmentation techniques, four amino acids were identified in a tholin sample that had been hydrolyzed in a 13 wt % ammonia-water solution at 253 + or - 1 K and 293 + or - 1 K for 1 year...

lowed by determination of radioactivity in respiratory COj, protein, lipids, organic acids, and free amino acids. The greatest quantitative and qualitative changes in asparagine metabolism were found in lymphosarcoma with leukemic blood picture. Chronic lymphocytic leukemia resembled the normal pattern with acute lymphocytic leukemia occupying an intermediate position. With pro gression of chro...

We are using molecular, biochemical, and genetic approaches to study the structural and regulatory genes controlling the assimilation of inorganic nitrogen into the amino acids glutamine, glutamate, aspartate and asparagine. These amino acids serve as the principal nitrogen-transport amino acids in most crop and higher plants including Arabidopsis thaliana. We have begun to investigate the regu...

Inorganic nitrogen in the form of ammonium is assimilated into asparagine via multiple steps involving glutamine synthetase (GS), glutamate synthase (GOGAT), aspartate aminotransferase (AspAT) and asparagine synthetase (AS) in Arabidopsis. The asparagine amide group is liberated by the reaction catalyzed by asparaginase (ASPG) and also the amino group of asparagine is released by asparagine ami...

Lactobacillus casei 393 cells which were energized with glucose (pH 6.0) took up glutamine, asparagine, glutamate, aspartate, leucine, and phenylalanine. Little or no uptake of several essential amino acids (valine, isoleucine, arginine, cysteine, tyrosine, and tryptophan) was observed. Inhibition studies indicated that there were at least five amino acid carriers, for glutamine, asparagine, gl...

I. Amino Acids A. Alkylamino Acids: :-Alkylamino acids, L-proline, L-valine. B. Hydroxyamino Acids: L-Serine, L-threonine, D-allothreonine, L-isoserine. C. Amino-amino Acids: L-2,3-Diaminopropionic acid, L-2,4-diaminobutyric acid. D. Carboxyamino Acids: L-Aspartic acid, 3-amino-pentanedioic acids. E. Thioamino Acids: D-Penicillamine, DOr L-methylcysteine, L-cysteine, L-methionine. F. Amido-amin...

acute lymphocytic leukemia cells to the level seen in 6C3HED mouse lymphoma. Asparagine requirement by other leukemic cells was inconsistent, and only four of 12 reached the level seen in acute lymphocytic leukemia. No other amino acid studied substituted for asparagine. Omission of asparagine, however, did not lower the uptake to the levels seen upon omission of cysteine, glutamine, histidine,...

acute lymphocytic leukemia cells to the level seen in 6C3HED mouse lymphoma. Asparagine requirement by other leukemic cells was inconsistent, and only four of 12 reached the level seen in acute lymphocytic leukemia. No other amino acid studied substituted for asparagine. Omission of asparagine, however, did not lower the uptake to the levels seen upon omission of cysteine, glutamine, histidine,...

In lb is research, adsorption of some amino acids and their complenation with manganese (II) ion on carbonnanotube (MWCNT) by using of four relations Langmuir, Freundlich. Temkin and Harkins -Jura imitherms wasinvestigated. From this relations. Freudlich and Temkin relations predict good equilibrium diagram in, isothermcondition. we could compute the theoretical constants by excel software. Hy ...