QL9 TFA

目录号: HY-P0287A 纯度: 98.16%: FAQs
Data Sheet SDS COA 产品使用指南

摩尔计算器

QL9 (QLSPFPFDL) TFA 是针对 2C T 细胞受体 (TCR) 的高亲和力同种异体抗原。

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Custom Peptide Synthesis

QL9 TFA Chemical Structure

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3. 试用装只面向终端客户。

规格	价格	是否有货
1 mg	￥550	In-stock
5 mg	￥1400	In-stock
10 mg	￥2100	In-stock
50 mg		询价
100 mg		询价

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生物活性
实验参考方法
纯度 & 产品资料
参考文献

生物活性

QL9 (QLSPFPFDL) TFA is a high-affinity alloantigen for the 2C T cell receptor (TCR).

体外研究
(In Vitro)

Mouse T cell clone 2C recognizes two different major histocompatibility (MHC) ligands, the self MHC K^b and the allogeneic MHC L^d. Two distinct peptides, SIY (SIYRYYGL) and QL9 (QLSPFPFDL), act as strong and specific agonists when bind to K^b and L^d, respectively. QL9 binding to MHC L^d is influenced by the majority of peptide side chains, distributed across the entire length of the peptide. Findings with both systems, but QL9-L^d in particular, suggest that many single-residue substitutions, introduced into peptides to improve their binding to MHC and thus their vaccine potential, could impair T cell reactivity due to their dual impact on TCR binding. T cell activation assays are performed to measure effects of peptide SIY and QL9 residues on T cell function^[2].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Formula

C₅₂H₇₄N₁₀O₁₄.xC₂HF₃O₂

性状

固体

颜色

White to off-white

Sequence

Gln-Leu-Ser-Pro-Phe-Pro-Phe-Asp-Leu

Sequence Shortening

QLSPFPFDL

运输条件

Room temperature in continental US; may vary elsewhere.

储存方式

Sealed storage, away from moisture

Powder	-80°C	2 years
	-20°C	1 year

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

溶解性数据

In Vitro:

DMSO 中的溶解度 : 100 mg/mL (超声助溶; 吸湿的 DMSO 对产品的溶解度有显著影响，请使用新开封的 DMSO)

摩尔计算器
稀释计算器

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Concentration _(start) × Volume _(start) = Concentration _(final) × Volume _(final)

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

浓度 _(start)

体积 _(start)

浓度 _(final)

体积 _(final)

In Vivo:

请根据您的实验动物和给药方式选择适当的溶解方案。

以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：
——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用；
以下溶剂前显示的百分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

方案一

请依序添加每种溶剂： 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (Infinity mM); 澄清溶液

此方案可获得 ≥ 2.5 mg/mL（饱和度未知）的澄清溶液。
以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；再向上述体系中加入 50 μL Tween-80，混合均匀；然后再继续加入 450 μL 生理盐水定容至 1 mL。
生理盐水的配制：将 0.9 g 氯化钠，溶解于 ddH₂O 并定容至 100 mL，可以得到澄清透明的生理盐水溶液。
方案二

请依序添加每种溶剂： 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.5 mg/mL (Infinity mM); 澄清溶液

此方案可获得 ≥ 2.5 mg/mL（饱和度未知）的澄清溶液。
以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。
20% SBE-β-CD in Saline 的配制（4°C，储存一周）：2 g SBE-β-CD（磺丁基醚 β-环糊精）粉末定容于 10 mL 的生理盐水中，完全溶解至澄清透明。
方案三

请依序添加每种溶剂： 10% DMSO 90% Corn Oil
Solubility: ≥ 2.5 mg/mL (Infinity mM); 澄清溶液

此方案可获得 ≥ 2.5 mg/mL（饱和度未知）的澄清溶液，此方案实验周期在半个月以上的动物实验酌情使用。
以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

动物溶解方案计算器

请输入动物实验的基本信息：

给药剂量

mg/kg

动物的平均体重

每只动物的给药体积

μL

动物数量

只

由于实验过程有损耗，建议您多配一只动物的量

请输入您的动物体内配方组成：

DMSO +

Tween-80 +

Saline

如果您的动物是免疫缺陷鼠或者体弱鼠，建议 DMSO 中的在最后工作液体系中的占比尽量不超过 2%。

方案所需 助溶剂 包括：DMSO，，均可在 MCE 网站选购。，Tween 80，均可在 MCE 网站选购。

计算结果

工作液所需浓度 : mg/mL

储备液配制方法 : mg 药物溶于 μL DMSO（母液浓度为 mg/mL）。

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

您所需的储备液浓度超过该产品的实测溶解度，以下方案仅供参考，如有需要，请与 MCE 中国技术支持联系。

动物实验体内工作液的配制方法 : 取 μL DMSO 储备液，加入 μL 。 μL ，混合均匀至澄清，再加 μL Tween 80，混合均匀至澄清，再加 μL 生理盐水。

连续给药周期超过半月以上，请谨慎选择该方案。

请确保第一步储备液溶解至澄清状态，从左到右依次添加助溶剂。您可采用超声加热（超声清洗仪，建议频次 20-40 kHz），涡旋吹打等方式辅助溶解。

纯度 & 产品资料

纯度: 98.16%

选择批次：

Data Sheet (617 KB) SDS (252 KB)

COA (268 KB) LCMS (98 KB)

产品使用指南 (1538 KB)

参考文献

[1]. Bowerman NA, et al. Different strategies adopted by K(b) and L(d) to generate T cell specificity directed against their respective bound peptides. J Biol Chem. 2009 Nov 20;284(47):32551-61. [Content Brief]

[2]. Speir JA, et al. Structural basis of 2C TCR allorecognition of H-2Ld peptide complexes. Immunity. 1998 May;8(5):553-62. [Content Brief]

Cell Assay ^[2]	Wild type 2C and high affinity 2C T cell transfectants m67 and m6 are incubated with K^b- or L^d-positive cells and various concentrations of peptide SIY and QL9 alanine variants. T cell activation is measured by assaying for levels of IL-2 release. Briefly, T cell transfectants (7.5×10⁴) are incubated with T2-K^b (7.5×10⁴) or T2-L^d (7.5×10⁴) along with various concentrations of peptide for 20-24 h at 37 °C and 5% CO₂. Supernatant is harvested, and levels of IL-2 are measured in an enzyme-linked immunosorbent assay type format. Results are plotted as percentage of maximal IL-2 release=((A_{450 (sample)}-A_{450(no peptide)})/(Max A_450(sample)-A_{450(no peptide)}))×100; signal obtained from no peptide is similar to that obtained for the null peptides MCMV or OVA. Binding curves are generated in GraphPad Prism by plotting the percentage of maximal IL-2 release against peptide concentration. The concentrations of peptide yielding 50% maximal IL-2 release (SD₅₀) are calculated using non-linear regression (sigmoidal fitting; GraphPad Prism) of the activation curves^[2]. MCE has not independently confirmed the accuracy of these methods. They are for reference only.
参考文献	[1]. Bowerman NA, et al. Different strategies adopted by K(b) and L(d) to generate T cell specificity directed against their respective bound peptides. J Biol Chem. 2009 Nov 20;284(47):32551-61. [Content Brief] [2]. Speir JA, et al. Structural basis of 2C TCR allorecognition of H-2Ld peptide complexes. Immunity. 1998 May;8(5):553-62. [Content Brief]

Cell Assay
^[2]

Wild type 2C and high affinity 2C T cell transfectants m67 and m6 are incubated with K^b- or L^d-positive cells and various concentrations of peptide SIY and QL9 alanine variants. T cell activation is measured by assaying for levels of IL-2 release. Briefly, T cell transfectants (7.5×10⁴) are incubated with T2-K^b (7.5×10⁴) or T2-L^d (7.5×10⁴) along with various concentrations of peptide for 20-24 h at 37 °C and 5% CO₂. Supernatant is harvested, and levels of IL-2 are measured in an enzyme-linked immunosorbent assay type format. Results are plotted as percentage of maximal IL-2 release=((A_{450 (sample)}-A_{450(no peptide)})/(Max A_450(sample)-A_{450(no peptide)}))×100; signal obtained from no peptide is similar to that obtained for the null peptides MCMV or OVA. Binding curves are generated in GraphPad Prism by plotting the percentage of maximal IL-2 release against peptide concentration. The concentrations of peptide yielding 50% maximal IL-2 release (SD₅₀) are calculated using non-linear regression (sigmoidal fitting; GraphPad Prism) of the activation curves^[2].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

参考文献

[1]. Bowerman NA, et al. Different strategies adopted by K(b) and L(d) to generate T cell specificity directed against their respective bound peptides. J Biol Chem. 2009 Nov 20;284(47):32551-61. [Content Brief]

[2]. Speir JA, et al. Structural basis of 2C TCR allorecognition of H-2Ld peptide complexes. Immunity. 1998 May;8(5):553-62. [Content Brief]

Help & FAQs

Do most proteins show cross-species activity?
Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

QL9QL 9QL-9OthersInhibitorinhibitorinhibit

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