DTNB (Cat.#:AYB26677)

Name: DTNB
Brand: 艾博立生物
SKU: AYB26677
Availability: InStock

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Cat.#：AYB26677

CAS：69-78-3

Chinese name：Ellman试剂

Size	Price
Free Sample (0.1 - 0.2 mg)		Inquiry
10 g		Inquiry
50 g		Inquiry
500 mg	￥350.00	AddToCart
1 g	￥450.00	AddToCart
10 mM * 1 mL in DMSO	￥500.00	AddToCart
5 g	￥650.00	AddToCart

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Sales Terms

Biological activity
Information

Biological activity

Bioactivity

DTNB (Ellman’s Reagent) is a chemical used to quantify the number or concentration of thiol groups.

CAS

69-78-3

Chinese name

Ellman试剂

Mol.Wt.

396.35

In vitro

DTNB reacts with the free sulfhydryl side chain of cysteine to form an S-S bond between the protein and a thionitrobenzoic acid (TNB) residue.
The main advantage of DTNB over alternative reagents (e.g., N-ethylmaleimide or iodoacetamide) is in the selectivity of this reagent and in the ability to follow the course of the reaction spectrophotometrically.
Modification of Enzyme with DTNB:
Modification of the SH groups of the enzyme is carried out by reacting 10 μL of 10 mM DTNB solution (about a 20-fold molar excess) at room temperature with 0.6 mL of enzyme solution (0.807 mg/mL) in 80 mM phosphate buffer, pH 8.0, containing 1 mM EDTA, which has been dialyzed previously against the same buffer solution for 24 h. The number of SH groups is estimated from the increase of absorbance at 410 nm using a molar extinction coefficient of 13,600 M^-1cm^-1 for thionitrobenzoate ions liberated.

The accuracy of these methods have not been independently confirmed. They are for reference only.

Format

Solid

Transportation

Room temperature in continental US; may vary elsewhere.

Solubility

In Vitro:

DMSO : 100 mg/mL (252.30 mM; ultrasonic and warming and heat to 60°C)

配制储备液

浓度溶剂体积质量	1 mg	5 mg	10 mg

1 mM	2.5230 mL	12.6151 mL	25.2302 mL
5 mM	0.5046 mL	2.5230 mL	5.0460 mL
10 mM	0.2523 mL	1.2615 mL	2.5230 mL

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

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

1.
请依序添加每种溶剂： 10% DMSO 40% PEG300 5% Tween-80 45% saline
Solubility: ≥ 2.08 mg/mL (5.25 mM); Clear solution
此方案可获得 ≥ 2.08 mg/mL (5.25 mM，饱和度未知) 的澄清溶液。
以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。
将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液
2.
请依序添加每种溶剂： 10% DMSO 90% (20% SBE-β-CD in saline)
Solubility: ≥ 2.08 mg/mL (5.25 mM); Clear solution
此方案可获得 ≥ 2.08 mg/mL (5.25 mM，饱和度未知) 的澄清溶液。
以 1 mL 工作液为例，取 100 μL 20.8 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。
将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明
3.
请依序添加每种溶剂： 10% DMSO 90% corn oil
Solubility: ≥ 2.08 mg/mL (5.25 mM); Clear solution
此方案可获得 ≥ 2.08 mg/mL (5.25 mM，饱和度未知) 的澄清溶液，此方案不适用于实验周期在半个月以上的实验。
以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

*以上所有助溶剂都可在 MCE 网站选购。

Purity

≥98.0%

Information

Intro	DTNB (Ellman’s Reagent) 是一种用于定量巯基数量或浓度的化学物质。常用于检测游离巯基。
Synonym	Ellman试剂; Ellman’s Reagent
Rela_targets	Covalent Screening Library Plus Bioactive Compound Library Plus Covalent Screening Library Human Metabolite Library

AYB26677