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D9779

Sigma-Aldrich

DL-二硫苏糖醇

for molecular biology, ≥98% (HPLC), ≥99% (titration)

同義詞:

(±)-二硫苏糖醇,外消旋二硫苏糖醇,二硫苏糖醇, 1,4-二巯基苏糖醇, DTT, 克莱兰氏试剂

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About This Item

線性公式:
HSCH2CH(OH)CH(OH)CH2SH
CAS號碼:
分子量::
154.25
Beilstein:
1719757
EC號碼:
MDL號碼:
分類程式碼代碼:
12161504
PubChem物質ID:
NACRES:
NA.31
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等級

for molecular biology

品質等級

化驗

≥98% (HPLC)
≥99% (titration)

形狀

powder

反應適用性

reagent type: reductant

mp

41-44 °C (lit.)

溶解度

H2O: 50 mg/mL

正離子痕跡

heavy metals (as Pb): ≤5 ppm

適合性

suitable for molecular biology

異物活動

DNase, RNase, protease, none detected

儲存溫度

2-8°C

SMILES 字串

O[C@H](CS)[C@H](O)CS

InChI

1S/C4H10O2S2/c5-3(1-7)4(6)2-8/h3-8H,1-2H2/t3-,4-/m1/s1

InChI 密鑰

VHJLVAABSRFDPM-QWWZWVQMSA-N

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一般說明

二硫苏糖醇 (DTT) 是维持蛋白质中 SH 基团还原态的优异试剂。它可引发硫醇-二硫键交换反应,完全还原生物分子中的分子内或分子间二硫键。DTT 专门靶向 N,N′-(丙烯酰)胱胺交联剂的二硫键,分解聚丙烯酰胺凝胶和十二烷基聚丙烯酰胺钠凝胶电泳 (SDS-PAGE) 基质。因此,其与定量还原二硫化物的缓冲液联用时非常有效。DTT 的刺激性和毒性低于2-巯基乙醇,浓度也达到β-巯基乙醇的7倍。

應用

DL-二硫苏糖醇用于蛋白质样品中,以在将样品上样到凝胶上进行蛋白质印迹或 SDS-PAGE 之前还原二硫键[1][2]它已用于 mRNA 原位杂交过程。[3][3]

这一物质可用于:
  • 在蛋白质印迹分析中用作蛋白提取的组分[4]
  • 配制用于定量质谱分析的样品裂解缓冲液[5]
  • 用作酶联免疫吸附测定 (ELISA) 的激酶缓冲液成分[6]
用于将 −SH 基保持在还原态的绝佳试剂;定量还原二硫化物。在 SDS-PAGE 前,DTT 在样品缓冲液中可有效还原蛋白二硫键。DTT 还可用于还原交联剂 N,N′-双(丙烯酰)胱胺的二硫键桥以分解聚丙烯酰胺凝胶基质。DTT 的刺激性和毒性都低于 2-巯基乙醇。通常,使用 DTT (100mM) 所需的浓度是使用 2-巯基乙醇 (5% v/v, 700mM) 的浓度的七分之一。

生化/生理作用

二硫苏糖醇 (DTT)常用于硫醇蛋白的生化制备和化学肽合成。DTT还用于蛋白质折叠和酶活性的蛋白质化学研究。[7]

特點和優勢

  • 适用于分子生物学
  • 不含RNA酶、DNA酶、核酸外切酶、蛋白酶
  • 高纯度(HPLC ≥98%)
  • 不含重金属 ≤5ppm

其他說明

如需了解生化试剂系列的更多信息,请填写此表

象形圖

CorrosionExclamation mark

訊號詞

Danger

危險聲明

危險分類

Acute Tox. 4 Oral - Eye Dam. 1 - Skin Irrit. 2

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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條款

Follow this DDT reduction protocol to reduce disulfide bonds in thiol-modified oligonucleotides.

按照此 DDT 還原方案還原硫醇修飾寡核苷酸中的二硫鍵。

Questions

1–7 of 7 Questions  
  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. What is the solution stability of Product D9779, DL-Dithiothreitol (DTT)?

    1 answer
    1. We generally recommend preparing DTT solutions fresh daily. A table showing the half life of DTT in solution under various conditions can be found on the product information sheet for a related DTT product (Product No. D0632).

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  4. What is the Department of Transportation shipping information for this product?

    1 answer
    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

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  5. What is the solubility of Product D9779, DL-Dithiothreitol?

    1 answer
    1. This product is soluble in water (50 mg/mL), yielding a clear, colorless solution. DTT is also soluble in ethanol, acetone, ethyl acetate, chloroform and ether. This information may be found on the product information sheet for a related DTT product (Product No. D0632).

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  6. What is the meaning of Molecular Biology Grade in the description of Product D9779, DL-Dithiothreitol?

    1 answer
    1. Molecular Biology grade products are tested for DNase, RNase, and protease to make certain that they contain minimal levels of these contaminants.

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  7. What is the shelf life of Product D9779, DL-Dithiothreitol?

    1 answer
    1. The recommended retest period for D9779 is 4 years. This information can be found on the Specification Sheet. The actual retest date for a given lot can be found on the Certificate of Analysis for that lot.

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