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L-色氨酸

CAS:No.73-22-3

英文名称:L-Tryptophan

纯度:HPLC≥98%

分子式:C11H12N2O2

分子量:204.23

储存条件:Store at RT,2 years.

L-色氨酸
货号:
ST8320
品牌:
Solarbio
SKU 北京总部 北京海淀 武汉 广州
ST8320-200mg 咨询 咨询 咨询 咨询
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本品为分析标准品。

使用本产品的案例(仅供参考

HPLC-MS

HPLC was performed using an HPLC-MS instrumen for detection and quantitation of tryptophan and kynurenine. The mass scan mode was set to positive and negative ions, and the range was set to 70–1000 m/z. Separation of tryptophan and kynurenine was carried out on an C18 column. Standards and samples were eluted using methyl alcohol and ultrapure water (0.1% formic acid). The injection volume was set to 5 µL, with a solvent flow rate of 0.2 mL/min. The column temperature was set to 40 ℃. The IDA mode was used for data acquisition.

来源文献:Ai Y, Wang B, Xiao S, Luo S, Wang Y. Tryptophan Side-Chain Oxidase Enzyme Suppresses Hepatocellular Carcinoma Growth through Degradation of Tryptophan. Int J Mol Sci. 2021 Nov 18;22(22):12428. doi: 10.3390/ijms222212428. PMID: 34830310;PMCID: PMC8623686.


HPLC

The SA content was determined using high-performance liquid chromatography with a 4.6 × 250 mm column . The mobile phase had a flow rate of 0.7 mL/min (isocratic elution) and was composed of acetonitrile and 0.1% phosphoric acid (97:3, v/v). The column temperature was 25 ℃, a UV–visible detector was used for detection at a wavelength of 213 nm, and the injection volume was 20 μL.

来源文献:Shi Y, Chen G, Chen K, Chen X, Hong Q, Kan J. Assessment of fresh star anise (Illicium verum Hook.f.) drying methods for influencing drying characteristics, color, flavor, volatile oil and shikimic acid. Food Chem. 2021 Apr 16;342:128359. doi: 10.1016/j.foodchem.2020.128359. Epub 2020 Oct 13. PMID: 33092919.


LC-MS/MS

LC-MS/MS conditions Analysis was performed using a liquid chromatographytandem mass spectrometer LC–MS/MS equipped with an ESI source. Separation was performed using a C18 column (250 mm × 4.6 mm × 5 μm). The flow rate was 0.4 ml/min, and the column temperature was maintained at 25℃. The mobile phases were formic acid: water (0.1:100, v/v) as mobile phase A, and methanol:acetonitrile (1:1) and 0.1% formic acid as mobile phase B. The binary gradient elution conditions were: (A:B): 0.01 min–5 min, 70:30→5:95;5–8 min, 5:95;8.01 min–16 min, 70:30. Detection was performed using multiple reaction monitoring (MRM) in positive mode, and the optimized MRM parameters for each compound are shown in Table 1. The mass condition parameters were set as: nebulizer gas, 3 L/min;drying gas, 10.0 L/min;heating gas, 10.0 L/min;interface temperature, 30℃;collision-induced dissociation (CID) gas, 230 kPa;DL temperature, 250℃;thermal block temperature, 400℃;interface voltage, −4.5 kV. The autosampler was kept at 4℃.

来源文献:Xu H, Pan LB, Yu H, Han P, Fu J, Zhang ZW, Hu JC, Yang XY, Keranmu A, Zhang HJ, Bu MM, Jiang JD, Wang Y. Gut microbiota-derived metabolites in inflammatory diseases based on targeted metabolomics. Front Pharmacol. 2022 Sep 27;13:919181. doi: 10.3389/fphar.2022.919181. PMID: 36238574;PMCID: PMC9551995.


HPLC

来源文献:Ai Y, Luo S, Wang B, Xiao S, Wang Y. MiR-126-5p Promotes Tumor Cell Proliferation, Metastasis and Invasion by Targeting TDO2 in Hepatocellular Carcinoma. Molecules. 2022 Jan 10;27(2):443. doi: 10.3390/molecules27020443. PMID: 35056756;PMCID: PMC8779717.


备注:
以上数据均来自公开文献, Solarbio暂未进行独立验证, 仅供参考。
These protocols are for reference only. Solarbio does not independently validate these methods.

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