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9 results for “L-phenylalanine”
Figure 3 in Amino acids L-phenylalanine and L-lysine involvement in trans and cis piperamides biosynthesis in two Piper species
Figure 3. The incorporation of the amino acid L-lysine in C –C5 piperidine amide (4,5-dihydropiperine, 2) and two C -C 6 6 3 dihydropyridinone amides (trans-piplartine, 7 and cis-piplartine, 8).
Figure 2 in Amino acids L-phenylalanine and L-lysine involvement in trans and cis piperamides biosynthesis in two Piper species
Figure 2. HPLC analysis of the enzymatic reactions (L-phenylalanine + enzymatic extract of P. tuberculatum leaves). Chromatogram A shows the formation of the cinnamic acid product after incubation of the amino acid L-phenylalanine with the enzymatic extract. Chromatogram B show the the blank for comparison (L-phenylalanine + enzymatic extract of P. tuberculatum leaves, previously treated with 6M hydrochloric acid for enzyme inactivation). Chromatogram C shows the retention time of the phenylpropanoid cinnamic acid (standard). In addition to the amino acidL-phenylalanine, L-tyrosine was also used as a possible precursor to phenylpropanoids, but no conversion to p-coumaric acid was observed.The same results were observed for P. arboreum.
Figure 1 in Amino acids L-phenylalanine and L-lysine involvement in trans and cis piperamides biosynthesis in two Piper species
Figure 1. Piperine (1), 4,5-dihydropiperine (2), fagaramide (4), piperlonguminine (5), 4,5-dihydropiperlonguminine (6), trans-piplartine (7), cis-piplartine (8), and dihydropiplartine (9) are piperamides biosynthesized by P. tuberculatum; 4,5-dihydropiperiline (3) is biosynthesized by P. arboreum.
Redox Activity of Chromium (III) with Picolinic Acid, Dipicolic Acid and L-Phenylalanine in Polar Aprotic Media
<p>Cyclic voltammetry (CV) was used to evaluate the electrochemical behavior of Cr (III) complexes in presence and absence of Brønsted acid and free radical formation on them in polar aprotic media. Tris- (2-pyridincarboxilate) of chromium (III) (Cr(pic)<sub>3</sub>) and, Cr(pic)<sub>3</sub> and Bis-(2,6-pyridinedicarboxylchromate (III) of sodium (Cr(dipic)<sub>2</sub>), exhibit two reversible coupled redox, where the anodic wave corresponds to the electrochemical response of the metal center, and the cathodic one is related to the ligand groups of different natural chemistry. Tris-(2-amino-3-phenylpropanoate) of chromium (III) (Cr(phen)<sub>3</sub>) complex has an irreversible electrochemical behavior out of the range of reductant agents, showing very poor response of the ligand. It is considered highly stable and very difficult to oxidize. When the CV was carried out in presence of ligands as Brønsted acid, the release of proton occurs and complex could adopt it through ligand coordinated. In order to understand radical formation in the complexes. N, N-dimethyl-p-nitrosoaniline (R-NO) was introducing as spin trap in presence of Chromium (III) complexes, forming an adduct with the ligand coordinated. All the electrochemical reaction change from their original state, but Cr(phen)<sub>3</sub> shows more wave relatives to the metal center: Cr(III) - Cr(IV), L-Phen, Cr(IV) - Cr(V), Cr(V)-Cr(IV) and Cr(IV) - Cr(III).</p>
Metabolic regulation of Th2 cells by L-phenylalanine
GEO Series GSE291310. Homo sapiens. 20 samples. Type: Expression profiling by high throughput sequencing.
The cellular response to the deprivation of L-phenylalanine from the medium in the cultivation of SAS, a squamous carcinoma cell line.
GEO Series GSE279292. Homo sapiens. 4 samples. Type: Expression profiling by high throughput sequencing.
The cellular response to the deprivation of L-phenylalanine from the medium in the cultivation of U87-MG, a glioblastoma-like cell line.
GEO Series GSE279293. Homo sapiens. 4 samples. Type: Expression profiling by high throughput sequencing.
The cellular response to the deprivation of L-phenylalanine from the medium in the cultivation of HaCaT, a keratynocyte cell line.
GEO Series GSE279291. Homo sapiens. 4 samples. Type: Expression profiling by high throughput sequencing.
The cellular response to the deprivation of L-phenylalanine from the medium in the cultivation of A375, a melanoma cell line.
GEO Series GSE279290. Homo sapiens. 4 samples. Type: Expression profiling by high throughput sequencing.
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