• Similar to the regulatory function of this protein in E. coli , five aromatic-pathway genes ( aroF-tyrA , aroP, aroL , and tyrP ) were significantly reduced upon deletion of the tyrR gene. (frontiersin.org)
  • Also a more recent development is the use of ICP-MS [ 16 - 20 ] and hence the detection of the sulphur-containing amino acids cysteine and methionine [ 17 ]. (hindawi.com)
  • Spectral properties of trifluoroacetic acid acetonitrile gradient systems for separation of picomole quantities of peptides by reversed phase high performance liquid chromatography," Journal of Chromatography , vol. 347, no. 1, pp. 83-88, 1985. (hindawi.com)
  • P. Lindroth and K. Mopper, "High performance liquid chromatographic determination of subpicomole amounts of amino acids by precolumn fluorescence derivatization with o -phthaldialdehyde," Analytical Chemistry , vol. 51, no. 11, pp. 1667-1674, 1979. (hindawi.com)
  • These aromatic amino acids are the derivatives of many secondary metabolites, all essential to a plant's biological functions, such as the hormones salicylate and auxin. (wikipedia.org)
  • Interestingly, the acid-stressed genes, hdeB and hdeD , were downregulated, and such downregulation partly accounted for the decrease in tolerance of the tyrR mutant under acidic conditions. (frontiersin.org)
  • To test the influence of growth conditions on amino acid production, we grew mutant strains of Synechocytis sp. (purdue.edu)
  • Currently, heterotrophic microorganisms are fed require an organic source of carbon to produce amino acids, photosynthetic bacteria are investigated. (purdue.edu)
  • Aromatic amino acid analysis (AAAA) offers excellent accuracy and a precision of about 5% relative standard deviation, including the hydrolysis step. (hindawi.com)
  • Amino acid analysis (AAA) seems to lose some importance over the recent years. (hindawi.com)
  • In addition, gas-chromatographic (GC) techniques have been applied for amino acid analysis for a long time [ 9 ]. (hindawi.com)
  • Recently, GC was applied for chiral amino acid analysis on spacecrafts [ 11 ], such as the robotic lander Philae [ 12 ]. (hindawi.com)
  • More recently, mass-spectrometric methods for amino acid analysis emerged [ 14 ]. (hindawi.com)
  • Plenty of powerful methods for amino acid analysis are available today. (hindawi.com)
  • This is study to investigate the plasma free amino acids profile in patients with decompensated liver cirrhosis and hepatic encephalopathy and its relation to the nutritional state of thes. (bioportfolio.com)
  • We quantified the amount of each aromatic amino acid synthesized intracellularly and transported to extracellular medium by high performance liquid chromatography. (purdue.edu)
  • The ELISPOT was developed by adding 100 l of 16 mm 3-amino-9-ethylcarbazole in 01 m sodium acetate buffer made up of 0015% H2O2 (Kit AEC, Sigma) to each well. (acmbcb.org)